Carlsbergite

Carlsbergite is a nitride mineral that has the chemical formula CrN,[1] or chromium nitride.

Carlsbergite
Carlsbergite was first described in the Agpalilik fragment of the Cape York meteorite.
General
Category	Mineral
Formula (repeating unit)	CrN
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	[1][2][3]

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.[1]

It occurs in meteorites along the grain boundaries of kamacite or troilite in the form of tiny plates.[1] It occurs associated with kamacite, taenite, daubreelite, troilite and sphalerite.[2]

In addition to the Cape York meteorite, carlsbergite has been reported from:[3]

• the North Chile meteorite in the Antofagasta Province, Chile
• the Nentmannsdorf meteorite of Bahretal, Erzgebirge, Saxony
• 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
• the Smithonia meteorite of Oglethorpe County, Georgia
• the Kenton County meteorite of Kenton County, Kentucky
• the Lombard meteorite of Broadwater County, Montana
• the Murphy meteorite of Cherokee County and the Lick Creek meteorite of Davidson County, North Carolina
• the New Baltimore meteorite of Somerset County, Pennsylvania