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Aldridgeite & Posnjakite

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UVM730351

Aldridgeite & Posnjakite

Rare Mineral

Description Tabs

Description
Locality: 
Kelly Mine, Magdalena, Socorro County, New Mexico, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.7 × 1.5 × 1.2 cm
Description

Blue crystals of aldridgeite with green posnjakite from the recent find at the Kelly Mine.   This find marked the third occurance of this cadmium analogue of serpierite.

Mineral Data
What's on the rock

Aldridgeite

Formula: 
(Cd,Ca)(Cu,Zn)4(SO4)2(OH)6·3H2O
Crystal System: 
Monoclinic
Hardness: 
3 - 0.0
Type Locality: 
Block 14 opencut, Broken Hill, Yancowinna Co., New South Wales, Australia
Isostructural with: 
Serpierite

Posnjakite

Formula: 
Cu4(SO4)(OH)6·H2O
Strunz: 
7.DD.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Nura-Taldy W deposit, Karagandy Province (Qaragandy Oblysy; Karaganda Oblast'), Kazakhstan...

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