Constituent
- Name
- Pentlandite
- IMA name
- Pentlandite
- Class
- non-silicate mineral
- Compound type
- sulfide
- Relevance
- unknown
- Arrangement
- single phase
- Formula
- $(Fe,Ni)_9S_8$
- Chemical formula
- (Fe,Ni)9S8
- Elemental formula
- (Fe)3.5-6 (Ni)2-5 S8
- Isotope mixture type
- terrestrial abundance
- Composition comments
- Common impurities: Co (series with Cobaltpentlandite), Ag, Cu
Strunz
- Class
- sulfides - sufosalts (02)
- Division
- metal sulfides, M:S sup 1:1 (mainly 2:1) (02.B)
- Family
- with Ni, Fe (02.BB)
- Code
- 02.BB.15a
Dana
- Major class
- sulfides (II)
- Class
- sulfides - including selenides and tellurides (02)
- Type
- where Am Bn Xp, with (m+n):p=9:8 (02.07)
- Group
- Pentlandite group (Isometric: Fm3m) (02.07.01)
- Code
- 02.07.01.01
- Phase type
- crystalline
- Crystal system
- isometric (cubic)
- Crystal class
- hexoctahedral
- Crystal class symbol
- m-3m (Oh)
- Crystal spacegroup
- Fm-3m
- Molar mass
- 771.94 $g/mol$
- Density
- 4.6-5 $g/cm^3$
- Refringence type
- unknown
- Refringence sign
- unknown
- Color
- bronze, brown
- Diaphaneity
- opaque
- Luster
- metallic