Carlsbergite

(repeating unit)CrNIMA symbolCbg^[1]Strunz classification1.BC.15Dana classification01.01.20.01Crystal systemCubicCrystal classHexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)Space groupFm3mUnit cella = 4.16 Å; Z = 4IdentificationColorLight gray in reflected light with rose tintCrystal habitOriented microscopic platelets, irregular to feathery grainsMohs scale hardness7LusterMetallicDiaphaneityOpaqueSpecific gravity5.9References^[2][3][4]

Carlsbergite is a nitride mineral that has the chemical formula CrN,^[2] or chromium nitride.

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

References