[ Top ] [ Japanese ]

Pentlandite [abbr. Pn ]

Year of discovery: 1856 (Espedalen mines, Norway, and Craignure mine, UK), 1933 (Japan)

Locality list: 95 localities of pentlandite

• Fe₉S₈
• (Fe,Ni)₉S₈
• [Fe²⁺₉][S₈]

• Class: Pentlandite group
• Class: Sulfide
• Insoluble in: HCl

• Polymorph: Mackinawite (Tetragonal)

• Fe => Ni: Godlevskite
• Fe => Co: Cobaltpentlandite (Series)

• Fe₉ => AgFe₈: Argentopentlandite
• Fe₉ => PbFe₈: Shadlunite
• Fe₉ => MnFe₈: Manganoshdlunite
• Fe₉ => CuFe₈: Sugakiite

• Color: Yellowish brown, Brown
• Streak: Pale yellowish brown
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Massive
• Aggregate: Co-crystallize with Pyrrhotite

• Cleavage: No, Parting on {111} (4 planes)
• Hardness: 3.5-4
• Density: 4.9

• System: Cubic
• Group: m3m, Fm3m
• Lattice: a=9.9

Etymology: Joseph Barclay Pentland (1797-1873), Irish scientist who found the first specimen.