Cosmochlor (from the Greek. Κόσμος - “world, space” and χλωρός - “green” ) is a rare mineral from the group of pyroxenes ( chain silicates ). Chemical formula: NaCr [Si 2 O 6 ]. Cosmochlor was first discovered in the Toluca iron meteorite ( Hikipulco , Mexico City , Mexico) by Hugo Lospeyres in 1897 .
| Cosmochlor | |
|---|---|
 Cosmochlor from North Burma | |
| Formula | NaCr [Si 2 O 6 ] |
| Impurity | Ti, Al, Fe, Mn, Mg, Ca, K, P |
| Physical properties | |
| Colour | Emerald green |
| Trait color | Pale green |
| Hardness | 6 |
| Cleavage | Clear in {110}; Separate by {001} |
| Density | 3.6 g / cm³ |
| Syngonia | Monoclinic |
Description
Monoclinic syngony . It occurs in the form of granular aggregates and impregnations. Isostructural with jadeite . Hardness on the Mohs scale 6. Cleavage is clear on {110}, individuality on {001}. The color is emerald green. The color of the line is pale green. The density of 3.6 g / cm 3 . In meteorites, it is usually included in prebrete . Synonyms : Chromakmit, Yuriit (named after the American physicist G.K. Yuri ), IMA1965-007.
Location
Kachin (state) , Burma ( Myanmar ); Piedmont , Italy; Hime River (Himekawa), ( Itoigawa ); Nimi , Japan; Coahuila meteorite ( Coahuila ), Toluca meteorite (first find) (Mexico); Morasko (meteorite) , Poznan , Poland; Tersky coast ( Kola Peninsula , Murmansk region ); Slyudyanka ( Irkutsk region ), Russia; Hex River Mountains meteorite ( Western Cape ), South Africa ; Canyon Diablo (meteorite) , Arizona, USA.
Literature
- H. Laspeyres Die steinigen Gemengtheile in Meteoreisen von Toluca in Mexico. Kosmochlor, ein neues kosmisches Mineral, In: Zeitschrift für Krystallographie und Mineralogie, Band 27 (1897), S. 586-600 ( PDF 656 kB )
- Zozulya D.R., Gavrilenko B.V., Savchenko E.E. Cosmochlor (NaCrSi 2 O 6 ) from coastal-marine sediments of the Tersky coast of the White Sea, Kola Peninsula // ZVMO, N3, 2003, pp. 102-109.