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Tyuyamunite & Coffinite

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RMM195079

Tyuyamunite & Coffinite

Radioactive

Description Tabs

Description
Locality: 
Haystack Butte, McKinley County, New Mexico, United States of America
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.5 × 1.2 cm
Description

This specimen consists of a thin coating of yellow tyuyamunite on limestone which also contains blebs of black coffinite.

Mineral Data
What's on the rock

Tyuyamunite

Formula: 
Ca(UO2)2(VO4)2·5-8H2O
Strunz: 
4.HB.25
Hardness: 
1.5 - 2.0
Type Locality: 
Tyuya-Muyun Cu-V-U deposit (Radium Mine), Alai Range (Alay Range), Osh Oblast, Kyrgyzstan

Coffinite

Formula: 
(U4+,Th)(SiO4)1-x(OH)4x
Strunz: 
9.AD.30
Hardness: 
5.0 - 6.0
Type Locality: 
La Sal No. 2 Mine, Beaver Mesa, Mesa Co., Colorado, USA

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