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Coffinite

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UVM630994

Coffinite

Radioactive

Description Tabs

Description
Locality: 
Jamestown, Boulder County, Colorado, United States of America
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3.7 × 1.6 cm
Description

A miniature size specimen of black coffinite grains in sandstone, from a rarely seen locality in Boulder County, Colorado.

Mineral Data
What's on the rock

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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