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Willhendersonite Biotite & Kalsilite

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ESM220549

Willhendersonite Biotite & Kalsilite

Description Tabs

Description
Locality: 
Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
Size Range: 
Miniature (4.5-7 cm)
Size: 
1.8 × 5 × 3.2 cm
Description

White willhendersonite crystals with minor brown phlogopite and acicular kalsilite

Mineral Data
What's on the rock

Willhendersonite

Formula: 
KCa[Al3Si3O12]·5H2O
Strunz: 
9.GD.10
Hardness: 
3.0
Streak: 
White
Type Locality: 
Vispi Quarry (incl. Celli; Pian di Celle), San Venanzo, Terni Province, Umbria, Italy

Biotite

Group Parent: 
Mica Group

Kalsilite

Formula: 
KAlSiO4
Strunz: 
9.FA.05
Hardness: 
6.0
Type Locality: 
Kamengo (Chamengo crater), Gomba District, Uganda