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Yazganite Tridymite & Cassiterite On Hematite

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CLB106107

Yazganite Tridymite & Cassiterite On Hematite

ex Thomas Krassmann coll.
Type Locality

Description Tabs

Description
Locality: 
Erciyes Volcanic Area, Kiranardi, Kayseri Province, Turkey
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 2.5 × 1.5 cm
Description

Nice specimen with uncommonly shaped black haematite crystals, white tridymite, little red cassiterite crystals and probably microscopic brown yazganite crystals (not analyzed - on the biggest haematite crystal). Type locality for yazganite.

Mineral Data
What's on the rock

Yazganite

Formula: 
NaFe3+2(Mg,Mn2+)(AsO4)3·H2O
Strunz: 
8.AC.10
Hardness: 
5.0
Type Locality: 
Erciyes volcanic complex, Kiranardi, Kayseri Province, Central Anatolia Region, Turkey

Tridymite

Formula: 
SiO2
Strunz: 
4.DA.10
Crystal System: 
Triclinic - Pedial
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0

Hematite

Formula: 
Fe2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0

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