Kittatinnyite

Formula:  Ca2MnSi2O8(OH)4 . 9H2O

Origin of name:  From Algonquin Indian word, kittatinny, meaning endless hills, referring to Franklin, NJ, area

 

Crystal system:  Hexagonal

Crystal class:  6/m 2/m 2/m

Twinning: 

Unit cell: 

 

Colour:  Bright yellow

Diaphaneity: 

Luster:  Vitreous

Habit:  Crystals extremely thin, to 0.2 mm diameter

Hardness:  ~ 4

Specific gravity:  2.61

Cleavage:  1; {0001} perfect

Tenacity: 

Streak:  Yellow

 

Synonyms/varieties:

 

Comments: 

 

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