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Galloplumbogummite & Crandallite

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JYJ723792

Galloplumbogummite & Crandallite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.9 × 0.6 × 0.6 cm
Description

A zonated galloplumbogummite crystal with the following concentric mineral zonation: 

core: galloplumbogummite

first outer ring: Ge rich galloplumbogummite

second outer ring: Ga analogon of crandallite (Ca>Pb)

filigrane parallel crystals around the zonated crystal: Ga rich plumbogummite

 

Mineral Data
What's on the rock

Galloplumbogummite

Formula: 
Pb(Ga,Al)3-xGexH1-x(PO4)2(OH)6 for 0 ≤ x ≤ 1
Hardness: 
0.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

Crandallite

Formula: 
CaAl3(PO4)2(OH)5·H2O
Strunz: 
8.BL.10
Crystal System: 
Trigonal
Hardness: 
5.0
Streak: 
White
Type Locality: 
Brooklyn Mine, Silver City, Tintic District, East Tintic Mts, Juab Co., Utah, USA
Analysis
Analysis Report - only: Galloplumbogummite & Crandallite
Analysis Report - only: Galloplumbogummite & Crandallite
Analysis Report - only: Galloplumbogummite & Crandallite
Analysis Report - only: Galloplumbogummite & Crandallite
Analysis Report - only: Galloplumbogummite & Crandallite