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Silicate

Kihlmanite-(Ce)

Ce₂TiO₂(SiO₄)(HCO₃)₂(H₂O)
Hardness3
Crystal systemTriclinic
ClassSilicate
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Kihlmanite-(Ce)

Kihlmanite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula Ce₂TiO₂(SiO₄)(HCO₃)₂(H₂O).

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

Key properties: Mohs hardness 3; specific gravity 3.66; Pale yellowish brown streak; Vitreous, silky in aggregates luster; optically biaxial.

IMA symbol Kih-Ce, IMA status: approved, named in 2012.

Found in a symmetrically-zoned pegmatite vein of arfvedsonite-aegirine-microcline in fenitized metavolcanic rock. Probably the product of low-temperature hydrothermal alteration of rinkite and loparite-(Ce).

It is found associated with Tundrite-(Ce).

The mineral was named to honor Alfred Oswald Kihlman (Kairamo) (1858-1938), a Finnish geographer and botanist, for whom Mt Kihlman and the mineral are named.

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 K minerals or help write this entry.