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Ewaldite & Donnayite-(Y)

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PJM100850

Ewaldite & Donnayite-(Y)

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.7 × 2.1 cm
Description

Pale translucent ewaldite with yellowish donnayite on a host matrix of large analcime crystals. This material has not been analysised to the best of my knowledge and the donnayite Y is the yellowish overgrowth on the ewaldite crystals

Mineral Data
What's on the rock

Ewaldite

Formula: 
Ba(Na,Ca,Y,Ce,K)(CO3)2·2.6H2O
Strunz: 
5.CC.05
Crystal System: 
Hexagonal
Hardness: 
0.0
Type Locality: 
Diamond Alkali Daco No. 3, Green River Formation, Sweetwater Co., Wyoming, USA

Donnayite-(Y)

Formula: 
NaCaSr3Y(CO3)6·3H2O
Strunz: 
5.CC.05
Hardness: 
3.0
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Earthstones Australia

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