Calcioburbankite
Calcioburbankite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Na₃(Ca,Ce,Sr,La)₃(CO₃)₅.
It crystallizes in the hexagonal crystal system (space group P2_1). It is a member of the Burbankite structural group.
Key properties: Mohs hardness 3–4; specific gravity 3.45; White streak; Vitreous, silky luster; optically uniaxial.
IMA symbol Cbbn, IMA status: approved, named in 1993.
A rare late stage mineral in association with an intrusive alkalic gabbro-syenite complex (Mont Saint-Hilaire).
It is found associated with Ancylite-(Ce), calcite, donnayite-(Y), fluorapatite, natrolite, pyrite, rhodochrosite, rutile, “chlorite” (vent or altered pegmatite); aegirine, calcite.
The calcium analog of burbankite.
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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