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Jôkokuite

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Sulfate mineral
Jôkokuite
Jôkokuite from Jokoku Mine, Hokkaido, Japan
General
CategorySulfate minerals
Formula
(repeating unit)		MnSO4・5H2O
IMA symbolJôk
Strunz classification07.CB.20
Dana classification29.6.7.4
Crystal systemTriclinic
Crystal classPinacoidal (1)
(same H-M symbol)
Space groupP1
Unit cella = 6.37 Å
b = 10.77 Å
c = 6.13 Å
Identification
ColorPink, pale pink, light pink, white, colorless
CleavageNone
FractureConchoidal
Mohs scale hardness2.5
LusterVitreous
StreakWhite
DiaphaneityTransparent to translucent
Specific gravity2.03
Optical propertiesBiaxial (−)
SolubilitySoluble in water
References

Jôkokuite is a manganese sulfate mineral with chemical formula MnSO4・5H2O. It crystallizes in the triclinic crystal system. It was discovered in 1976 by Matsuo Nanbu at the Jokoku mine in Hokkaido, and is named after the location.

References

  1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ "Jôkokuite". www.mindat.org. Retrieved 2023-01-15.
  3. ^ "Jokokuite". webmineral.com. Retrieved 2023-01-15.
  4. 松原聡 (2006). フィールドベスト図鑑 vol.15 日本の鉱物. 株式会社学習研究社. ISBN 4-05-402013-5.

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