Raberite
Raberite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Tl₅Ag₄As₆SbS₁₅.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2.5–3; specific gravity 5.649; Dark brown-red streak; Metallic luster.
IMA symbol Rbr, IMA status: approved, named in 2012.
Found in cavities in saccharoidal dolomitic marble.
It is found associated with Hatchite/wallisite, smithite, realgar, trechmannite, edenharterite, jentschite.
The mineral was named to honor Dr. Thomas Raber (b. 1966), an expert on Lengenbach minerals.
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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