Carlsbergite
Chromium nitride mineral found in meteorites
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Carlsbergite is a nitride mineral that has the chemical formula CrN,[2] or chromium nitride.
| Carlsbergite | |
|---|---|
Carlsbergite was first described in the Agpalilik fragment of the Cape York meteorite. | |
| General | |
| Category | Minerals |
| Formula | CrN |
| IMA symbol | Cbg[1] |
| Strunz classification | 1.BC.15 |
| Dana classification | 01.01.20.01 |
| Crystal system | Cubic |
| Crystal class | Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
| Space group | Fm3m |
| Unit cell | a = 4.16 Å; Z = 4 |
| Identification | |
| Color | Light gray in reflected light with rose tint |
| Crystal habit | Oriented microscopic platelets, irregular to feathery grains |
| Mohs scale hardness | 7 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| Specific gravity | 5.9 |
| References | [2][3][4] |
It is named after the Carlsberg Foundation which backed the recovery of the Agpalilik fragment of the Cape York meteorite in which the mineral was first described.[2]
It occurs in meteorites along the grain boundaries of kamacite (nickel-rich native iron) or troilite (FeS: iron sulfide) in the form of tiny plates.[2] It occurs associated with kamacite, taenite, daubreelite, troilite and sphalerite, (Zn,Fe)S.[3]
In addition to the Cape York meteorite, carlsbergite has been reported from:[4]
- the North Chile meteorite in the Antofagasta Province, Chile
- the Nentmannsdorf meteorite of Bahretal, Saxony, Germany
- the Okinawa Trough, Senkaku Islands, Okinawa Prefecture, Japan
- the Uwet meteorite of Cross River State, Nigeria
- the Sikhote-Alin meteorite, Sikhote-Alin Mountains, Russia
- the Hex River Mountains meteorite from the Cape Winelands District, Western Cape Province, South Africa
- the Canyon Diablo meteorite of Meteor Crater, Coconino County, Arizona, United States
- the Smithonia meteorite of Oglethorpe County, Georgia, United States
- the Kenton County meteorite of Kenton County, Kentucky, United States
- the Lombard meteorite of Broadwater County, Montana, United States
- the Murphy meteorite of Cherokee County and the Lick Creek meteorite of Davidson County, North Carolina, United States
- the New Baltimore meteorite of Somerset County, Pennsylvania, United States