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Jeremejevite & Pseudobrookite

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ZLT128398

Jeremejevite & Pseudobrookite

Description Tabs

Description
Locality: 
Emmelberg, Üdersdorf, Daun, Eifel, Rhineland-Palatinate, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
1.1 × 2.1 × 1.2 cm
Description

Part of a clay xenolith lined with sanidine showing one of the rare Jeremejevite balls and a nice pseudobrookite crystal. Individual crystals of jeremejevite are abou 80 µm long and 10 µm thick.
Dates from 1990.

Mineral Data
What's on the rock

Jeremejevite

Formula: 
Al6(BO3)5(F,OH)3
Strunz: 
6.AB.15
Crystal System: 
Hexagonal
Hardness: 
7.0
Type Locality: 
Soktuj Gora (Mount Soktuj), Adun-Cholon Range, Nerchinsk Gem mines, Nerchinsk (Nertschinsk), Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia...

Pseudobrookite

Formula: 
Fe2TiO5
Strunz: 
4.CB.15
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
6.0
Streak: 
Brown
Type Locality: 
Uroi Hill (Arany Hill), Simeria, Hunedoara Co., Romania

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