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Hillesheimite

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JYJ629130

Hillesheimite

Description Tabs

Description
Locality: 
Graulay Quarry, Hillesheim, Vulkaneifel, Rhineland-Palatinate, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.7 × 1.5 cm
Description

Extremely rare analysed hillesheimite. B. Ternes & W. Schüller specimen. 

Structurally related to günterblassite & umbrianite. 

Type locality!

 

Mineral Data
What's on the rock

Hillesheimite

Formula: 
(K,Ca,Ba,□)2(Mg,Fe,Ca,□)2[(Si,Al )13O23(OH)6](OH)·8H2O
Hardness: 
0.0
Type Locality: 
Graulay (Graulai; Graulei; Grauley), Hillesheim, Eifel, Rhineland-Palatinate, Germany