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Strüverite

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PJM94504

Strüverite

Ex J & S Mommers Collection

Description Tabs

Description
Locality: 
Vorondolo, Tsarazaza, Fandriana, Amoron'i Mania, Madagascar
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.3 × 1.3 cm
Description

This rare earth oxide appears not to be a valid species anymore, but rather a variety of rutile. It is closely related to Ilmenorutile, however the presence of Tantalum makes for a very unique chemistry. This piece features a very sharp, well formed, dark brownish-black crystal of "Struverite" measuring 1.5 cm on massive translucent Quartz matrix. These specimens are no longer being found.

Mineral Data
What's on the rock

Strüverite

Variety Of: 

Rutile

Formula: 
TiO2
Strunz: 
4.DB.05
Hardness: 
6.0 - 6.5
Formula: 
(Ti,Ta,Fe)O2
Hardness: 
6.0 - 6.5
Earthstones Australia

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