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Oxyphlogopite

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GFM615992

Oxyphlogopite

Rare Mineral

Description Tabs

Description
Locality: 
Zirkel Mesa, Leucite Hills, Sweetwater County, Wyoming, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.5 × 5.6 × 3.4 cm
Largest Crystal: 
0.20cm
Description

pale reddish-brown 2 mm tabular crystals, very rich with colorless 1 mm needle crystals of a titanium-rich potassicrichterite and leucite in lamproite lava. South zirkel mesa is the third-known location for this rare mica mineral,

Mineral Data
What's on the rock

Oxyphlogopite

Formula: 
K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2
Strunz: 
9.EC.20
Hardness: 
3.0 - 0.0
Streak: 
Brown
Type Locality: 
Rothenberg, Bell, Mendig, Eifel, Rhineland-Palatinate, Germany