Encyclopedia of Japanese Minerals (Go to Intro Page)
by Alfredo Petrov
Minerals Starting with "H"
"HAGATALITE"
= REE-rich ZIRCON (qv) from Hagata, Ehime-ken.
HAIWEEITE (haiwii-seki)
Kagoshima: At the Tarumi mine, from which it was originally reported as "ranquilite".
Tottori: Originally reported as "ranquilite" in petrified wood and carbonaceous matter in oxidized parts of an epigenetic uranium deposit in Pliocene lacustrine basal conglomerate overlying granite at the Tohgoh mine. The "metaranquilite" reported from here might be haiweeite too, or the non-approved species "metahaiweeite"?
HALITE (gan-en)
(Evaporite rocks are unknown in Japan, but halite occurs sporadically in insignificant and short-lived quantities as a fumarolic mineral and by evaporation around tidal pools and some hot springs.)
Fukuoka: Shikanoshima.
Miyazaki: Binrohjima.
Saitama: Forming with alunogen on the surface of tuff in the Yoshimi hills.
Shizuoka: Shimokamo hot spring.
HALLOYSITE-7A ("METAHALLOYSITE") (meta-haroi-seki)
(Forms on dehydration of halloysite-10A, so is abundant at all "halloysite" localities.)
HALLOYSITE-10A ("ENDELLITE", "HYDROHALLOYSITE") (haroi-seki; haroisaito)
(Alters to "metahalloysite" (halloysite-7A) on drying, so halloysite XRD pattern is often no longer detectable on old samples.)
Ehime: At the Nomura mine, as 1 to 15cm nodules in the oxide zone of a bedded Mn deposit. A microscopic intergrowth of halloysite with braunite, takanelite, goethite and quartz.
Hiroshima: A major component of clay sediment in the floor of Onino-Iwaya limestone cave, with mica, chlorite, montmorillonite and kaolinite.
Kumamoto: Chalky white (or stained light brown) nodules to over 2.5cm from Kikuka-machi have an outer shell of creamy white compact kaolinite around a partly hollow core that is partially filled with "endellite" or "hydrohalloysite" which, through dehydration, shrank to a crumbly dark brown mass of halloysite-7A. These concretions are popularly known as "manju-seki" because of their resemblance to traditional japanese manju bean cakes. Chalky white balls of "hydrohalloysite" to 3cm diameter in Taragi-machi. Also at Issyochi (same place???).
Nagasaki: The hakudo ore ("white clay") mined for refractories at the Taishu mine, and often called "kaolin", is in fact mostly halloysite, created by hydrothermal alteration around fissures in Miocene quartz porphyry.
Niigata: Mixed-layer halloysite-montmorillonite (0.8:0.2) occurs with minor gibbsite and goethite in the weathering zone of an "acid clay deposit" in Itoigawa.
Okayama: Mined as white earthy masses in Yoshinaga-cho.
Okinawa: On Okinawa Island, halloysite and illite (not kaolinite) are the dominant clay minerals in the "Oku red soils".
HARADAITE (harada-ishi; harada-seki)
Iwate: Haradaite occurs in low-grade rhodonite-quartz ore at the Noda-tamagawa manganese mine, the first locality at which this strontium-vanadium silicate was found (1960), although it was not characterized from here.
Kagoshima: The Yamato manganese mine is considered the type locality for haradaite (even though it was only described from here in 1962, two years after having been first found at the Nodatamagawa mine). It occurs, very sparsely, as bright emerald-green vitreous masses and platy crystals to 5cm(!), but usually no more than 3mm, with cleavages in three directions (perfect on (010), parallel to the tabular habit; distinct on (100) and (001)), as veinlets in Cretaceous or Paleozoic metasedimentary low-grade pink to light pinkish brown, stratiform siliceous compact-massive fine-grained low-grade rhodonite ore with brownish green roscoelite, reddish manganoan goldmanite ("yamatoite") and quartz, and as similar veinlets in the banded chert country rock. Analysis (wt% oxides) Si 38.38, V'''' 26.16, Al 0.36, Ti 0.06, Fe'' 0.12, Mn'' 0.19, Ca 1.27, Na 0.01, K 0.04, Sr 27.08, Ba 4.90, Pb 0.02, Cu 0.20, water 1.24. (RI 1.713 - 1.734; H 4.5; D 3.80; streak very pale green; pleochroism colorless to very pale green and liight yellowish green, and bluish green.)
Kouchi: In manganese ore at the Matsuo mine.
HARMOTOME (juudo-juuji-fusseki)
Shimane: Harmotome crystals as Morvenite-law twins in fissures in green tuff at Udo, associated with calcite, pyrite, chalcopyrite, sphalerite and laumontite.
Tokyo: In low-grade metamorphic chert from the Shiromaru manganese mine. Crusts of colorless clear tabular crystals at Hinatawada.
HASTINGSITE (hesutingu-senseki; hesuchingusu-senseki; tetsu-hesutingu-senseki)
Hokkaido: Hastingsite in biotite-bearing epidote-hornblende schist at Mitsuishi, in rocks of the Kamuikotan metamorphic belt, gave an empirical formula (Ca 1.56, Na 0.82, K 0.16) (Fe'' 1.68, Mg 1.65, Al 0.89, Fe''' 0.68, Ti 0.09, Mn'' 0.03) (Si 6.42, Al 1.58) O 22 (OH) 1.68 (with 0.01 wt% P2O5) (Shidou, F. & Seki, Y. (1959) Journ. Geol. Soc. Japan, 65, 673).
Iwate: Poorly defined material from axinite-amphibole-quartz rock on Kannon-yama might be hastingsite (qv Ferrohornblende).
Nagano: Bright grass-green, fine acicular inclusions form phantoms in clear quartz crystals at the Kobushi mine.
Okayama: At the Sanpo (Sampo) mine, greenish black acicular crystals of hastingsite to 4cm form divergent aggregates, with coarse-grained calcite which is colored dark green by micro-acicular inclusions.
Ouita: "Ferrohastingsite" is associated with andradite, hedenbergite and vesuvianite in skarn at the Obira mine. Analysis gives an empirical formula (Ca 2.03, Na 0.87, K 0.19) (Fe'' 3.47, Fe''' 0.67, Mg 0.46, Ti 0.07, Mn'' 0.03) (Si 6.23, Al 1.72) O 22 ((OH) 2.47, Cl 0.06, F 0.03) (Matsumoto, Y. & Miyahisa, M. (1960) Journ. Min. Soc. Japan, 4, 372). Specimens widely distributed in japanese collections consist of solid masses composed of 2 to 2.5cm divergent bundles of black hastingsite fibres. Some large transparent fluorite crystals here display dark phantoms composed of "lawns" of tiny short hastingsite needles.
HAUERITE (haueru-koh)
(Hauerite is never found in japanese manganese deposits; alabandite being the only stable Mn sulphide in such ores.)
Aomori: Sharp 1mm octahedral xls, steel grey on fresh surfaces, are associated with sulfur, kaolinite, As-rich pyrite and marcasite, on the edge of a steam-explosion crater cutting the lacustrine sediments in the Osorezan caldera, although most of the hauerite here is just earthy, not crystalline. Hauerite seems to have precipitated where ascending hydrothermal solutions met the oxidized acid sulfate water in the crater lake.
HAUSMANNITE (hausuman-koh)
(In the innumerable japanese meta-sedimentary Mn deposits, hausmannite occurs in a wide range of parageneses: as common inclusions in tephroite and alleghanyite; ubiquitous alteration product of manganosite; common as fine intergrowths with carbonate and/or tephroite - the dense dark brown types known as "chocolate ore"; and extremely fine-grained hausmannite is possibly responsible for the reddish color often seen in the cryptocrystalline silica (chert) country rock.)
Gifu: Very fine-grained manganosite is partially oxidized to hausmannite, with braunite in carbonatic Mn ore in meta-chert at the Fukutomi mine. An interesting specimen of apparently typical hausmannite "chocolate ore", from 8m depth, turned out (by XRD) to be mainly manganosite with only minor oxidation to hausmannite, leading to the possibility that other japanese "chocolate ores" may not have as much hausmannite as previously supposed. Fine-grained hausmannite was an important constituent of metasedimentary Mn ore at the Nagashima mine, with carbonate, garnet and bementite.
Iwate: The major ore mineral in hausmannite-rhodochrosite ores at the Noda-Tamagawa mine, coarsely crystalline, intergrown with massive tephroite, rhodonite, braunite, manganosite, sometimes minor barite, neotocite, galaxite, pyrite, kinoshitalite, in folded metasedimentary Mn ore hosted in Paleozoic chert. Spectro shows Fe, V, and traces of In, Cu, Ti, Cr, Ni.
Kyoto: With pyroxmangite, tephroite and rhodochrosite, as chocolate-brown 2 or 3mm-wide bands in metasedimentary banded Mn ore at the Ashidani mine. Also in metachert at the Shin-Otani mine (and probably at other mines in the Tanba district).
Nagano: As a major component of high-grade, banded folded, hausmannite-alleghanyite ore in metamorphosed chert at the Hamayokokawa mine, where it is also associated with feitknechtite, manganosite, jacobsite and rhodochrosite. Fine-grained hausmannite ore here (possibly formed from braunite?) includes rhodochrosite and is cut by younger rhodochrosite veinlets.
Shiga: Abundant as black, lustrous, fine-granular masses to 10cm, known as "chocolate ore", in rhodochrosite-sonolite-manganosite ore at the Ioi mine. Also as concentrated patches in the alleghanyite-dominant ores here. Forms rims around manganosite in carbonate-rich ores. Sub-parallel stringers of hausmannite in carbonate-alleghanyite ore give this ore a "gneissic" appearance. Other associated minerals include galaxite, bementite, barite, neotocite.
Tokyo: With braunite and cymrite in banded Mn ore at the Shiromaru mine. Also as dark brown, fine-grained masses, cut by jacobsite and whitish rhodochrosite veinlets, hosted in metasedimentary chert at the Kiyokawa mine.
HEDENBERGITE (kaitetsu-kiseki)
Fukui: Manganoan hedenbergite is abundant as large prismatic dark green crystals in skarn at the Nakatatsu mine. Four analyses on material from the Nakayama orebody gave (with % of johannsenite and diopside molecules) He 62 Jo 31 Di 7; He 54 Jo 40 Di 6; He 47 Jo 44 Di 9; He 42 Jo 41 Di 17. The less Mn-rich varieties are associated with andradite, the more Mn-rich ones with bustamite, and it grades into Fe-rich johannsenite. Also at the Sannotake mine.
Fukushima: As hedenbergite-garnet-chalcopyrite-magnetite skarn at the Yaguki mine, by a granodiorite contact. (qv babingtonite)
Gifu: Hedenbergite crystals, light grey-green, to 6cm long, 7mm wide, as divergent sprays can be found at Higashihora, near the Kakino mine; sometimes as hollow shells, often mostly replaced by fibrous actinolite. At the Kamioka mine, abundant hedenbergite forms deep green translucent, prismatic crystals to 1cm long, in diverging groups, and also massive aggregates, partially altered to actinolite, associated with sphalerite, epidote, chlorite, calcite, quartz and ilvaite in concentric-radial Mokuji-type skarn ore. Rough columnar green crystals to 4cm may contain inclusions of 1mm graphite xls. Green to greenish brown hedenbergite, massive or as aggregates of large columnar crystals, is found with silky tan ferrobustamite and lustrous brown grossular crystals at the Horado mine.
Iwate: Manganoan hedenbergite is associated with bustamite at the Hijikuzu mine, in metamorphosed bedded manganese ore. Also at the Kamaishi mine.
Nara: In skarn near the Kohse mine, hedenbergite crystals to 10cm form large radiating aggregates.
Okinawa: With andradite and quartz in skarn at contact between limestone and volcanics on Tonaki island.
Ouita: Dark green, columnar or tabular xls over 6cm size, displaying (100), (111), (110), (010) and (001) faces, are associated with fluorite, chalcopyrite and quartz in a skarn orebody at the Kiura mine. At the Obira mine, associated with hastingsite; may be covered by crusts of fluorite, or form green prismatic inclusions in fluorite. Hedenbergite from Ohkuradani can contain rounded grains of native bismuth.
Shiga: Manganoan hedenbergite at the Ishibe mine.
Shimane: At the Sasagatani copper mine, as massive aggregates of acicular or prismatic xls, some with over 4.5% MnO (i.e. grading towards johannsenite), in a contact deposit. As quartz-hedenbergite skarn, containing tsumoite (qv) and various other bismuth and tellurium minerals, at the Tsumo mine.
Yamaguchi: Abundant manganoan hedenbergite forms brownish green to greyish green xls to 7cm long and 1cm diameter in skarn at the Kiwada scheelite mine, associated with manganoan grossular-andradite, and green quartz. In cobaltite(qv)-bearing skarn at the Naganobori mine.
HEJTMANITE (heitoman-seki)
Aichi: From the Taguchi mine as tiny brown to golden brown scales and cleavages in masses to 12mm embedded in pink rhodonite ore.
HELVITE (herubin; herubaito)
Gunma: In metasedimentary manganese ore at the Mogurazawa mine.
Iwate: Tetrahedral helvite crystals to 2cm wide occur in massive rhodonite ore at the Hongou mine, a contact metamorphosed bedded manganese deposit.
Nagano: Light brown masses of helvite to 3cm enclosed in pink rhodonite ore at the Yagizawa mine, the first locality for helvite in Japan.
HEMATITE (seki-tekkoh)
(Museum specimens of post-volcanic thin platy hematites in Japan can reach 6cm across. Locality???)
Akita: Thin tabular hexagonal hematite crystals to 1cm were found on crystalline quartz in cavities in a quartz vein at the Hisaichi mine. Aggregates of thin scales on and in quartz crystals in cavities in a chalcopyrite-pyrite-quartz vein at the Arakawa mine. Also in the Ani mine and the Osarizawa mine.
Hokkaido: Post-volcanic druses of thin platy crystals at Ayumikotan, with spiral growth hillock structures to 5mm across on the c-face. Hematite crystals, associated with heulandite and mordenite, in dolerite cavities at Shikiusu and Nokkamappu. Mn-bearing massive hematite is the main ore at the Kokuriki mine.
Iwate: At the Sennin (Wagasennin) mine, bright metallic iron-black hexagonal platy xls to 7mm, with some basal faces striated parallel to the edge of the prism, occur in cavities in massive hematite and in quartz in a contact metamorphic iron deposit. Also as mammilary-botryoidal masses, with individual spheroids to 2cm, formed of very thin radiating specular lamellae, and no associated species. Local people call the brilliantly specular flakes here "kuro-daia" (black diamonds). Also very acute rhombohedral pyramids. At the Isagozawa mine, hematite (the main ore mineral) forms nests in massive quartz in Paleozoic radiolarian slate.
Miyazaki: Compact masses of hematite and limonite were deposited on liparite by spring water at Masaki. (Also specular hematite at a volcanic crater somewhere in Miyazaki-ken??).
Nagano: Hematite crystals of fumarolic origin were deposited on dacite lava at Sasazawa. Twinned crystals of ribbon-like habit are frequent. Crystals with undulated growth steps. Accelerated growth at the twin junction is related to the presence of crystallites of a Mn-Ti-rich phase.
Nagasaki: On Saganoshima (Sagashima) island, thin platy black xls to 1mm thick and over 2cm across (although usually just as druses of tiny crystals), with flat specular faces, or with the basal face striated parallel to the edge of the prism, occur in cavities in andesite and andesitic scoria. A few crystals form elongated lathes.
Okayama: Sharp hexagonal platy crystals to 3cm diameter and 3mm thick, with well-developed triangular striations on the base, some crystals as X-shaped penetration twins, are found in vugs in basaltic scoria at Giboshiyama (Gihofuji) on Shimotokuyama. Tabular crystals to 2.5cm across and 4mm thick at Okutsu. ((same place?????))
Tokyo: Reddish brown stalagmitic aggregates of earthy hematite occur on Otoutojima island in the Ogasawara archipelago.
HEMIMORPHITE (ikyoku-koh)
Gifu: Banded botryoidal incrustations of white, fine acicular to thin tabular fan-like hemimorphite crystals occur in weathered zinc ore at the Kamioka mine. Sometimes associated with Zn-rich veszelyite in decomposed skarn in the Urushiyama orebody here; and on altered sphalerite at Mozumi.
Ouita: White to colorless transparent multi-cm botryoidal aggregates formed of thin tabular to acicular xls showing (010), (110), (301) and (011) as major faces, with small (101) faces, with individual spherules to 1cm, line cavities in brick-red to brown earthy limonite at the Wandou pit of the Kiura mine. Also as thin druses lining spheroidal vugs. Isolated crystals to 3mm at the Kuranari section here. As botryoidal aggregates of acicular xls to a few mm long in cavities in limonite at the Obira mine.
Yamaguchi: At the Oumine mine, botryoidal crusts of radial-acicular 1mm xls occur in cavities in limonite in weathered zinc ore. Also at the Ogawa mine, the Kitabira mine, and the Zohmeki mine.
HEMUSITE (hemusu-koh)
Kagoshima: Hemusite from the Iriki mine had been previously reported as "stannian tetrahedrite", due to incomplete analysis which did not consider molybdenum. Associated with goldfieldite as dark wavy ginguro-type bands in white quartz.
Shizuoka: In the Osawa #4 vein of the Kawazu mine, metallic grey to violet-grey micrograins and microcrystals of hemusite form compact grey ginguro bands to several mm wide and several cm long in massive white chalcedonic quartz. Isolated pyrite crystals, Cu-sulfide grains and secondary Cu species are also present. (Min. J. Japan, 14, #3, July 1988)
HENMILITE (henmi-ishi; henmi-seki)
Okayama: Henmilite was originally found at Fuka in 1986 as scarce, bluish violet vitreous crystals to 0.2mm, and as crystal aggregates and small grains or anhedral masses, often little more than a purplish blue stain, associated with calcite (some as colorless "dogtooth" crystals), minor brucite, nifontovite and olshanskyite in small cavities in a pentahydroborite vein cutting a high-temperature pyrometasomatic marble. A second, and larger, find was in a Ca-borate vein averaging 10cm wide (max. to 2m wide), composed of takedaite, nifontovite, olshanskyite, sibirskite, parasibirskite, henmilite and pentahydroborite. Richer specimens, with deep blue henmilite crystals to 3mm, came out in 1992 from vugs in a calcite vein cutting gehlenite-spurrite skarn, with sillenite, kusachiite, bakerite, tenorite, bultfonteinite, apophyllite, cuspidine and thaumasite. Exceptional crystals were found again in 2000. An extraordinary 4m pocket yielding thousands of top-quality specimens was worked in mid-2002 (first appearing in public at the Fall 2002 Kyoto show). The largest known measuring 12mm(!), but they are normally much smaller, and even specimens with 5mm crystals are prized by collectors.
HERZENBERGITE (herutsenberugu-koh)
Hokkaido: Occurs as micro inclusions with toyohaite (qv) and berndtite at the Toyoha mine, in a banded hydrothermal sphalerite-chalcopyrite vein traversing massive pyrite-sphalerite ore.
Ouita: As black metallic crystals and scaly aggregates to over 5cm, with sphalerite, pyrite and siderite in calcite-dolomite matrix at the Houei tin mine.
HESSITE (hessu-koh)
Fukuoka: Hessite grains, some of them slightly selenian (up to 0.7 wt% Se), occur with melonite, volynskite and petzite in a late-stage vein in scheelite-bearing quartz skarn at the Yokozuru mine.
Hyougo: Lead-grey hessite, with minor electrum, forms 1cm-wide interrupted bands in fractured white quartz vein at the Takeno mine.
Ishikawa: Reported at the Chuuguu mine.
Iwate: Visible under ore microscope with pyrite, altaite, petzite and sylvanite in milky quartz from the Nojiri mine.
Kagoshima: In small amounts, with minor petzite and altaite, in black "ginguro" bands to 1cm thick, consisting mainly of sphalerite, chalcopyrite and galena, in large quartz-calcite veins in Miocene andesite at the Kushikino silver-gold mine. Also at the Yamada mine.
Shimane: With the assemblage of cassiterite, stannite and tellurian canfieldite in grossular-clinopyroxene skarn in the Maruyama Au-Cu-Pb-Zn-W orebody of the Tsumo mine.
Shizuoka: Very tiny grains in ginguro-type ore at the Kawazu mine. One exceptional museum specimen displays a wavy band of dark grey massive hessite to 1cm thick, running parallel to a brownish bronzy calaverite band.
HEULANDITE-Na (sohda-ki-fusseki)
Fukuoka: With stilbite-Na, forming the cement in a Tertiary conglomerate in Tsuyazaki-machi. Analysis corresponds to (Na 4.70, K 0.74, Ca 0.65, Mg 0.08) (Al 8.25, Si 28.09) O 72 (H2O) 22.87 (Ueno & Hanada, 1982).
HEXAHYDROBORITE (rokusui-kaihoh-seki)
Okayama: Colorless glassy blocky crystals to 2mm in borate-rich skarn at Fuka. (brick-shaped with beveled edges).
"HIBSCHITE" (Qv Grossular) (hipushyuu-zakuro-ishi)
HIDALGOITE (idarugo-seki)
Akita: Hidalgoite forms thin crystalline "nile-blue" aggregates as pseudomorphs after dissolved stout prismatic veszelyite crystals in the oxide zone of Pb-Zn-bearing copper ore at the Hisaichi mine.
Hokkaido: Otarumatsukura mine.
HILLEBRANDITE (hireburando-seki)
Hiroshima: Kushiro.
Okayama: Massive, pale greenish white to very light green, minute prismatic crystals with prismatic cleavage, aggregated as 2 to 3mm-wide veinlets, cutting massive spurrite skarn, and also as white veinlets cutting tilleyite, at Fuka. Easier to find as veins in the deep purple spurrite, where the color contrast makes it stand out more. Sometimes associated with perovskite, or with fukalite, or containing white micrograins of kilchoanite. A bit unstable in the air, and on exposure it loses its glassy green tint, turning dull white. Also from the Mihara mine.
HINGGANITE-(Ce) (seriumu-hingan-seki) (IMA# 2004-004)
Gifu: The type locality for this rare member of the gadolinite group is the Iwaguro-Sekizai quarry in Tawara pegmatite district. Occurs as light red-brown to grey, idiomorphic short prismatic crystals from 1mm to 1cm long, associated with quartz, feldspar, mica, cassiterite, stokesite, fluorite, and chlorite. Major atomic abundances (apfu) in the REE position are: Ce 0.54, Y 0.51, Nd 0.31, Sm 0.14, Gd 0.12, La 0.11, Pr 0.11, Dy 0.11. Minor REE (as wt% of oxides): Er 1.84, Ho 1.08, Yb 1.02, Tb 0.5, Lu 0.3, Eu tr, Tm tr. Originally published in 1987, but because Ce was only slightly dominant, and considering the analytical margin of error, the IMA did not formally approve the species until 17 years later.
Shiga: Small grains in a placer derived from Sn-W-bearing pegmatite at "Shinmen, Tanakari" (error for Tanokamiyama????).
HOERNESITE (kudo-ka)
Fukushima: White, silky fibrous hoernesite fills fissures in forsterite-ludwigite rock at the Hayama mine. (= Haneyama nickel mine, also in Kawamata???)(probably yes.)
"HOKOITE"
Hiroshima: Named for the Hoko mine in northeastern Hiroshima-ken. (No other information available. Seems to have been an aborted species.)
"HOKUTOLITE" = Pb-rich barite (qv. BARITE)
HOLLANDITE (horando-koh)
Aichi: (From a lost locality; where???).
Ehime: Hollandite, strontian hollandite, cryptomelane and intermediate minerals (Ba 0.07-0.99, K 0.00-0.75, Sr 0.00-0.42, Pb 0.00-0.05 apfu) are associated with braunite-abswurmbachite and Ba-Pb-bearing tweddillite as a nodule in quartz-piemontite schist (metachert) of the Sanbagawa metamorphic belt in the Saruta-gawa area (Masaki Enami & Yasuyuki Banno (2001): "Partitioning of Sr between coexisting minerals of the hollandite- and piemontite-groups in quartz-rich schists from the Sanbagawa metamorphic belt, Japan." Am. Min. 86, 205-214). Hollandite also occurs in the same general area in the Sazare mine.
Tokushima: Bizan.
"HOROBETSUITE"
= antimonian bismuthinite (qv) and bismuthian stibnite from the Horobetsu sulfur mine, Hokkaido. Once thought to be perhaps a mixture, but seems to be an isomorphous series of intermediate varieties with the ratio of bismuthinite and stibnite molecules ranging from 7:3 to 3:7.
HUANGITE (fuuan-seki)
Gumma: Huangite, natroalunite and minamite (qv) occur in concentric growth in pseudohexagonal "minamiite" crystals to 3mm diameter and 0.5mm thick, in a 2-pyroxene andesite altered by sulphuric hot spring activity at Okumanza, the second reported world locality for huangite.
Kagoshima: Huangite occurs as a sulfuric alteration of plagioclase-rich volcanics in the Nansatsu area. This material had originally been assumed to be minamiite, although it is close to the end-member composition of huangite.
HUEBNERITE (mangan-juu-seki)
(Unlike other countries, huebnerite in Japan is found mainly in metamorphosed manganese ores.)
Gifu: Sparse accessory component of metasedimentary rhodochrosite-quartz-pyroxmangite ore at the Ajiro mine.
Gumma: Dark brown blades to 1.5cm embedded in pink metamorphic manganese ore at the Hagidaira mine.
Hokkaido: Accessory component of Mn-rich sediment metamorphosed by granite intrusion at the Tatehira manganese mine. Also at the Kokkoh mine.
Iwate: Sparingly with kinoshitalite in hausmannite-tephroite ore in the Noda-Tamagawa mine.
Saitama: In manganese ore at the Hirogawara mine.
Tochigi: "Wolframite" (Fe-rich huebnerite?) at the Itaga manganese mine. Confirmed huebnerite comes from the Kaso Mn mine and the xenothermal polymetallic Nishizawa mine.
Yamaguchi: A minor constituent (but more abundant than in other Mn deposits) of pyroxmangite-carbonate-garnet-neotocite ore hosted in metachert at the Renge mine. Almost end-member composition, with less than 1% Fe, and spectroscopic traces of Ti, Zn, Mg, Si, Ca, Al, Cu, Ag; but no Mo.
HUNTITE (hanto-ishi)
(NB: not listed in Mineral Species of Japan, but is in Japan Raman database)
Nagasaki: Nagasaki city (decomp. of serpentine?).
HUTCHINSONITE (hacchinson-koh)
Hokkaido: In Tl-bearing kuroko-type ore at the Tohya-Takarada deposit, with chabourneite and unnamed (Tl,Ag)2Pb6(As,Sb)16S31.
HYALOPHANE (haiarofen)
(Included here with species status because of the miscibility gaps between hyalophane and both celsian and orthoclase.)
Aichi: With pyroxmangite in the silicate-carbonate Mn ore of the Taguchi mine.
Iwate: Intergrowths with barian microcline and albite form the "barian K-feldspar" in manganese ore at the Noda-Tamagawa mine.
Tochigi: Kaso mine (which also has the potassian celsian known as "kasoite").
Tokyo: Composes veinlets at the Shiromaru mine, sometimes with tokyoite microinclusions.
"HYDROBIOTITE" (sui-kuro-unmo)
(= 1:1 regularly interstratified biotite-vermiculite; See under vermiculite)
HYDROCERUSSITE (sui-haku-en-koh)
Fukushima: The "plumbonacrite" reported from the Mizuhiki mine might be hydrocerussite.
Miyazaki: Toroku mine.
"HYDROGROSSULAR" (Qv Grossular) (kasui-kaiban-zakuro-ishi)
HYDROTALCITE (haidoro-taruko-seki; haidorotarukaito)
(where???)
HYDROTUNGSTITE (kasui-juuseki-ka)
Kyoto: Reported from Gyohjayama. (If it is as unstable as the type locality material from Bolivia, specimens have probably all dehydrated to tungstite already.)
HYDROXYLAPATITE (suisan-rinkai-seki)
Saitama: Yellowish green, chlorine-rich hydroxylapatite occurs in the Uzunosawa orebody of the Chichibu mine, associated with magnetite, chlorite, tremolite and calcite in skarn. It occurs as prismatic crystals to 2cm, or anhedral masses to 4cm, translucent, with a prismatic cleavage, hardness 5 and density 3.14. Anion ratios are PO4 5.91 SiO4 0.11; OH 0.76 Cl 0.67 F 0.57. The "wilkeite" or silicate-rich chlorapatite (qv) from the Takiue orebody is also very OH-rich, and some of that material might be hydroxylapatite.
HYDROXYLELLESTADITE (suisan-eresutado-seki)
Saitama: The type locality for this calcium silicate-sulfate-hydroxide of the apatite group is the Doshinkubo deposit at the Chichibu mine, where it occurs in skarn as pale violet to purplish white vitreous translucent masses up to 100 Kg, with individual anhedral grains to 2cm. Associated with diopside, wollastonite, clintonite, vesuvianite and white calcite. The anion ratios here are SiO4 2.86 SO4 2.68 CO3 0.37 PO4 0.09; OH 1.88, Cl 0.26, F 0.15. The hardness (4.5) is slightly lower than for other apatites; the density is 3.01. Some of the "chlorellestadite" (qv) from elsewhere in the Chichibu mine may actually be hydroxylellestadite too.
HYDROXYL-HERDERITE (suisan-heruderu-seki)
Ibaragi: In the Yukiiri pegmatite, the only one in Japan with a significant variety of phosphates.
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