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Sulfate mineral From Wikipedia, the free encyclopedia
Jôkokuite is a manganese sulfate mineral with chemical formula MnSO4・5H2O. It crystallizes in the triclinic crystal system.[2][3] It was discovered in 1976 by Matsuo Nanbu at the Jokoku mine in Hokkaido, and is named after the location.[4]
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Jôkokuite | |
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General | |
Category | Sulfate minerals |
Formula (repeating unit) | MnSO4・5H2O |
IMA symbol | Jôk[1] |
Strunz classification | 07.CB.20 |
Dana classification | 29.6.7.4 |
Crystal system | Triclinic |
Crystal class | Pinacoidal (1) (same H-M symbol) |
Space group | P1 |
Unit cell | a = 6.37 Å b = 10.77 Å c = 6.13 Å |
Identification | |
Color | Pink, pale pink, light pink, white, colorless |
Cleavage | None |
Fracture | Conchoidal |
Mohs scale hardness | 2.5 |
Luster | Vitreous |
Streak | White |
Diaphaneity | Transparent to translucent |
Specific gravity | 2.03 |
Optical properties | Biaxial (−) |
Solubility | Soluble in water |
References | [2][3] |
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