Okhotskite

A valid IMA mineral species

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Okhotskite

Kokuriki mine, Kitami City, Okhotsk Subprefecture, Hokkaidō Prefecture, Japan

Okhotskite

Kokuriki mine, Kitami City, Okhotsk Subprefecture, Hokkaidō Prefecture, Japan

Okhotskite

Kokuriki mine, Kitami City, Okhotsk Subprefecture, Hokkaidō Prefecture, Japan

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About OkhotskiteHide

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Formula:

Ca₂Mn²⁺Mn³⁺₂[Si₂O₆OH][SiO₄](OH)₂(OH)

Colour:

Deep orange

Lustre:

Vitreous

Hardness:

6

Specific Gravity:

3.40 (Calculated)

Crystal System:

Monoclinic

Member of:

Pumpellyite Group

Name:

Named for the Sea of Okhotsk, located near the type locality.

Type Locality:

ⓘ Kokuriki mine, Kitami City, Okhotsk Subprefecture, Hokkaidō Prefecture, Japan

Pumpellyite Group.
Forms a solid solution series with pumpellyite-(Al).

Unique IdentifiersHide

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Mindat ID:

2968

Long-form identifier:

mindat:1:1:2968:7

GUID
(UUID V4):

339a51e2-5486-46e1-bc6d-3c7d2e1e7a6b

Classification of OkhotskiteHide

Mineral SymbolsHide

Physical Properties of OkhotskiteHide

Optical Data of OkhotskiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.782(5) n_β = 1.820(5) n_γ = 1.827(5)

2V:

Measured: 46° (5), Calculated: 46°

Max Birefringence:

δ = 0.045

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Very High

Dispersion:

indiscernible

Pleochroism:

Strong

Comments:

X = yellow, Y and Z = deep orange, X < Y < Z.

Chemical Properties of OkhotskiteHide

Crystallography of OkhotskiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of OkhotskiteHide

Synonyms of OkhotskiteHide

Other Language Names for OkhotskiteHide

Relationship of Okhotskite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of OkhotskiteHide

Other InformationHide

Internet Links for OkhotskiteHide

References for OkhotskiteHide

Reference List:

Togari, K. & Akasaka, M. (1987) Okhotskite, a new mineral, a manganese ion(3+)-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine: 51: 611-614.

Togari, K. & Akasaka, M. (1987) Okhotskite, a new mineral, a manganese ion(3+)-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine: 51: 611-614.

American Mineralogist (1988): 73: 1495-1496.

Dasgupta, Somnath; Chakraborti, Sanjib; Sengupta, Pulak; Bhattacharya, P. K.; Banerjee, H.; Roy, Supriya; Fukuoka, M. (1991) Manganese-rich minerals of the pumpellyite group from the Precambrian Sausar Group, India. American Mineralogist: 76: 241-245.

Kimura, Yoshio; Akasaka, Masahide; Sakakibara, Masayuki; Shinno, Isamu; Togari, Kenji (1995) Distribution of Fe3+ and Mn3+ in okhotskite. Shimane Daigaku Chishitsugaku Kenkyu Hokoku: 14: 43-54. (in Japanese)

Akasaka, M., Suzuki, Y. & Watanabe, H. (2003) Hydrothermal synthesis of pumpellyite-okhotskite series minerals. Mineralogy and Petrology: 77: 25-37.

Yabuta, W., Hirajima, T. (2020) A new occurrence of okhotskite in the Kurosegawa belt, Kyushu, Japan: the okhotskite + Mn–lawsonite assemblage as a potential high–pressure indicator. Journal of Mineralogical and Petrological Sciences: 115(6): 431-439.

Localities for OkhotskiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Italy
Aosta Valley Saint-Marcel ⓘ Praborna Mine	M.E. Ciriotti collection (EDS probed)
Liguria Genoa Ne Reppia ⓘ Gambatesa Mine	Identification by EDS and PXRD as reported by Anatoly Kasatkin
Japan (TL)
Hokkaidō Prefecture Okhotsk Subprefecture Kitami City ⓘ Kokuriki mine (TL)	Togari, K., & Akasaka, M. (1987). Okhotskite, a new mineral, an Mn3+-dominant member of the pumpellyite group, from the Kokuriki mine, Hokkaido, Japan. Mineralogical Magazine, 51(62), 611-614.
Kanagawa Prefecture Ashigarakami District Yamakita ⓘ Takamatsu mine	Yamada, S. (2004) Nihonsankoubutsu Gojuonhairetsu sanchi-ichiranhyou. p 60.
Kochi Prefecture Nankoku city ⓘ Ananai mine	Journal of Mineralogical and Petrological Sciences 103,400-406(2008)
Russia
Khakassia (Republic of Khakassia) Askizsky Rayon Askiz ore district ⓘ Chapsordag deposit	Kassandrov, E. G., & Mazurov, M. P. (2009). Magmatogenic manganese ores of the South Minusa Intermontane Trough. Geology of Ore Deposits, 51(5), 356.
ⓘ Malosyrsky deposit	Kassandrov, E. G., & Mazurov, M. P. (2009). Magmatogenic manganese ores of the South Minusa Intermontane Trough. Geology of Ore Deposits, 51(5), 356.