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Chemical Composition:
Ca2Mn7+2Si10O28(OH)2·5H2O
Group: -
System: Triclinic
Family: Silicates
Hardness: 6
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- Small, prismatic crystals
- Brittle
- Fusible
- Other colours: rose-red to flesh-red becoming colourless
on exposure
- Soluble in acids, but not after ignition
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