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Silicate

Rosenbuschite

Ca₆Zr₂Na₆ZrTi(Si₂O₇)₄(OF)₂F₄
Hardness5–6
Crystal systemTriclinic
ClassSilicate
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Rosenbuschite specimen

Rosenbuschite - Alkali feldspar from Norra Kärr, Sweden — Photo: Kritzolina · CC BY-SA 4.0

Rosenbuschite

Rosenbuschite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₆Zr₂Na₆ZrTi(Si₂O₇)₄(OF)₂F₄.

It crystallizes in the triclinic crystal system (space group P-1). It is a member of the Seidozerite-Rinkite structural group.

Key properties: Mohs hardness 5–6; specific gravity 3.3–3.31; White streak; Vitreous luster; optically biaxial.

IMA symbol Rbs, IMA status: approved, named in 1887.

Found in some nepheline syenites and related pegmatites.

It is found associated with Aegirine, natrolite, sodalite, zircon, lº a venite, rinkite, eudialyte, leucophanite (Langesundsfjord, Norway).

The name refers to Professor Carl Harry F. Rosenbusch (1836–1914), German geologist and mineralogist, Heidelberg, Germany.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more R minerals or help write this entry.