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Kinoshitalite on Tephroite

#PD34810

Kinoshitalite on Tephroite

#PD34810
Availability
Sold
Size
4 x 3 x 3 cm - Miniature 
Formula
BaMg3(Si2Al2)O10(OH)2 (RRUFF)
Locality
Kamocho, Souraku Co., Kyoto Pref., Japan

Phyllosilicate - Monoclinic - Mica group member. Brittle Mica - Trioctahedral. Barium occupies the Interlayer cation positions with Mg at the (M) sites.  May contain Mn and Ti. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Occurs as scales to 1mm, yellow-brown, in Mn-rich, Mn bearing marbles and skarns and in metamorphc granulite facies of Mn ore  deposits (Bernard & Hrysl). Also with haussmanite, tephroite ore in Japan. Only 2 US localities  and Langban per Mindat.

This specimen shows tiny yellowish platelets.

Kinoshitalite

Formula
BaMg3(Si2Al2)O10(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Scaly 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow brown, colorless 
Streak
yellow white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection

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