Ferronickelplatinum

Ferronickel platinum is a very rarely occurring minerals from the mineral class of elements (including natural alloys, intermetallic compounds, carbides, nitrides, phosphides and silicides) with the chemical composition Pt2FeNi and thus is chemically seen as a natural alloy, more precisely an intermetallic compound of platinum, nickel and iron in a ratio of 2:1:1. Ferronickel platinum crystallizes in the tetragonal crystal system, but has so far only been found in microcrystalline form. Ferronickel platinum occurs together with other platinum group minerals as irregular, slightly rounded or grape-like grains of up to 4.5 millimetres (180 mils) in size, with the mono-mineral areas only up to about 0.15 millimetres (5.9 mils) in size. Ferronickel platinum is opaque in every form and shows a metallic sheen on the silver-white grain surfaces.