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Gregoryite & Nyerereite

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SKY910492

Gregoryite & Nyerereite

Type Locality

Description Tabs

Description
Locality: 
Ol Doinyo Lengai, Ngorongoro District, Arusha Region, Tanzania (United Republic)
Class: 
Crystal Group/Cluster
Size Range: 
Micromount (under 1cm)
Size: 
0.2 × 0.2 × 0.2 cm
Description

A lot of white crystals and crystal aggregates of a mixture of gregoryite & nyerereite from the TL in Tanzania for both species, in a completely analyzed specimen by SEM/EDS, see copy enclosed.

Specimen in photo 1 is relatively big (about 2 mm), the others are smaller.

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Gregoryite

Formula: 
(Na2,K2,Ca)CO3
Strunz: 
5.AA.10
Crystal System: 
Hexagonal
Hardness: 
0.0
Type Locality: 
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

Nyerereite

Formula: 
Na2Ca(CO3)2
Strunz: 
5.AC.10
Hardness: 
0.0
Type Locality: 
Mt Oldoinyo Lengai (Ol Doinyo Lengai), Arusha Region, Tanzania

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