Ewaldite ( English Ewaldite ) - a rare mineral , barium-calcium carbonate . Named the honor of the German physicist and crystallographer Paul Peter Ewald [1] [2] [3] .
| Evaldite | |
|---|---|
| Formula | Ba (Na, Ca, Y, Ce, K) (CO 3 ) 2 * 2.6H 2 O |
| Impurity | TR, La, Pr, Nd, Gd, Tb, Dy |
| Physical properties | |
| Colour | bluish green, greenish gray, white |
| Trait color | white |
| Transparency | transparent |
| Cleavage | missing |
| Density | 3.25 g / cm³ |
| Syngonia | hexagonal |
Content
Properties
Evaldite is a greenish transparent mineral. It occurs in the form of prismatic crystals in Eocene lake sediments. Evaldite opened in 1971 in Wyoming , USA [1] [2] [3] .
Name in other languages
- him. Ewaldit ;
- Spanish Ewaldita ;
- English Ewaldite .
Notes
- ↑ 1 2 Ewaldite - Mineralogy Database
- ↑ 1 2 Ewaldite Mineral Data
- ↑ 1 2 American Mineralogist, 1971 , p. 2156.
Literature
- Fleischer M. et al. New Mineral Names (English) // American Mineralogist: Journal. - 1971. - T. 56 , No. 11-12 . - S. 2156-2159 .