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Erionite & Offretite

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SYM529945

Erionite & Offretite

Rare Mineral

Description Tabs

Description
Locality: 
Phelps Dodge Corporation Well #1, Little Ajo Mountains, Pima County, Arizona, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 2 × 0.5 cm
Description

White tiny crystal clusters of erionite on matrix.

Mineral Data
What's on the rock

Erionite

Synonym Of: 

Erionite-Ca

Formula: 
(Ca,K2,Na2)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Erionite-K

Formula: 
(K2,Ca,Na2)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Erionite-Na

Formula: 
(Na2,K2,Ca)2[Al4Si14O36]·15H2O
Strunz: 
9.GD.20
Hardness: 
3.5 - 4.0

Offretite

Formula: 
KCaMgAl5Si13O36·16H2O or near
Strunz: 
9.GD.25
Hardness: 
4.0 - 4.5
Type Locality: 
Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Saint-Georges-en-Couzan, Loire, Rhône-Alpes, France