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Henritermierite

MNHN N°206.80

visu_48 infos

FROM : N'chwaning II Mine, Kuruman, Republic of South Africa
SIZE : 8 x 4 cm

general description

This sample mesures 8 x 4 cm. It has a large number of orangeish brown crystals associated with black hausmannite (manganese oxide) with pseudo-octahedral crystals.

The size of henritermierite crystals is not superior to 2 mm. The sample comes from N'chwaning II Mine in the Republic of South Africa.

Acquired thanks to support from Total, it is today kept in the storage rooms of the collections of the Muséum national d’Histoire naturelle (i.e., not yet displayed to the public).

Photography: Louis-Dominique Bayle, © MNHN.

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The Species page

Identity card

SPECIE : Henritermierite

HISTORY : Species dedicated to Pr. Henri Termier (1897-1989), French geologist

Species first described in 1969 by C. Gaudrefoy (1888-1971) et al.

Type-locality: Mine Tachgagalt, Ourzazat, Morocco

CHEMICAL FORMULA : Ca3 (Mn, Al)2 (SiO4)2 (OH)4
CRYSTAL SYSTEM : Tetragonal
COLOR : Brown-orangeish, yellow
DIAPHANIETY : Translucent
LUSTER : Vitreous
STREAK : White
MORPHOLOGY : Pseudo-octahedric crystals, aggregates, granular
HARDNESS : 4
DENSITY : 3,34

CHEMICAL CLASS : VIII - Silicates
GROUP : Garnet
STRUNZ CLASS BEFORE 2001 : 8/A.08-160
STRUNZ CLASS AFTER 2001 : 9.AD.15

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