Burnsite
Burnsite is an IMA-recognized mineral species in the halide class, with the chemical formula KCdCu₇O₂(SeO₃)₂Cl₉.
It crystallizes in the hexagonal crystal system (space group P6_3/mmc).
Key properties: Mohs hardness 1–1.5; specific gravity 3.85; Red streak; Vitreous luster; optically uniaxial.
IMA symbol Bur, IMA status: approved, named in 2000.
A very rare fumarolic sublimate, formed at an estimated 450 ° C–500 ° C.
It is found associated with Cotunnite, sofiite, ilinskite, georgbokiite, chloromenite.
The mineral was named to honor Professor Peter Carman Burns (1966–), Canadian mineralogist and structural crystallographer, University of Notre Dame, Notre Dame, Indiana, USA.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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