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Haiweeite

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FNW39833

Haiweeite

Radioactive

Description Tabs

Description
Locality: 
Teofilo Otoni, Mucuri Valley, Minas Gerais, Brazil
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 0.8 × 1 cm
Description

Litlle (3 mm.) tuft of extremely fine bright yellow hairs of haiweeite on mica & feldspar.

This is a very rare, hydrated calcium uranium silicate.

Mineral Data
What's on the rock

Haiweeite

Formula: 
Ca(UO2)2[Si5O12(OH)2]·6H2O
Strunz: 
9.AK.25
Crystal System: 
Orthorhombic
Hardness: 
3.5
Streak: 
White
Type Locality: 
Unnamed U occurrence [1], Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
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