Kinoshitalite

Formula:  (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2

Origin of name:  For Dr. Kameki Kinoshite, Japanese geologist (1896-1974), investigator of ore deposits in Japan.

 

Crystal system:  Monoclinic

Crystal class:  2/m

Twinning: 

Unit cell: a = 5.345, b = 9.25, c = 10.25, β = 99.99°

 

Colour:  Yellow-brown, colourless

Diaphaneity: Transparent to translucent

Luster:  Vitreous

Habit:  Scales <1 mm

Hardness:  2.5 to 3

Specific gravity:  3.30

Cleavage:  1; {001} perfect

Tenacity: Brittle

Streak: yellow white

 

Synonyms/varieties:

 

Comments: 

 

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