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Goosecreekite

MNHN N°190.96

visu_23 infos

FROM : Nasik, Maharashtra, India
SIZE : 17 x 12.5 cm

general description

On these two great specimens of goosecreekite, goosecreekite (white) is associated with tilbite crystals (pink) and with apophyllite crystals (colourless). These three minerals had settled in the centre of a basalt geode (hydrothermal sediment of low temperaure).

The support from Total made the acquisition of this Nasik specimen possible . This sample is currently exposed in the Treasure Room, within the Gallery of Mineralogy of the Muséum national d'Histoire naturelle.

Photography: Louis-Dominique Bayle, © MNHN.

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The Species page

Identity card

SPECIE : Goosecreekite

HISTORY : Named after its type-locality: Goose Creek

Species first described in 1980 by Dunn and al.

Type-locality: Goose Creek quarry, Loudoun Co., Virginia, USA

CHEMICAL FORMULA : Ca Al2 Si6O16 5H2O
CRYSTAL SYSTEM : Monoclinic
COLOR : Colourless to white
DIAPHANIETY : Transparent
LUSTER : Vitreous to pearly
STREAK : White
MORPHOLOGY : Polycrystalline aggregates, isometric crystals
HARDNESS : 4,5
DENSITY : 2,21

CHEMICAL CLASS : VIII - Silicates
GROUP : Heulandite - brewsterite
STRUNZ CLASS BEFORE 2001 : 8/J.23-60
STRUNZ CLASS AFTER 2001 : 9.GE.05

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