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Jahnsite-(CaMgMg) & Girvasite

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JYJ911795

Jahnsite-(CaMgMg) & Girvasite

Description Tabs

Description
Locality: 
Mejillones Peninsula, Mejillones, Antofagasta Province, Antofagasta Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 2.3 cm
Description

Bright brown jahnsite-(CaMgMg) with bakhchisaraitsevite and white girvasite sprays on matrix. SEM-EDS & XRD confirmed. 

 

Mineral Data
What's on the rock

Girvasite

Formula: 
NaCa2Mg3(PO4)2(H2PO4)(CO3)(OH)2·4H2O
Strunz: 
8.DO.05
Hardness: 
3.5
Type Locality: 
Kovdor Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...