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Silicate

Törnebohmite-(Ce)

Ce₂Al(SiO₄)₂(OH)
Hardness4.5
Crystal systemMonoclinic
ClassSilicate
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Törnebohmite-(Ce)

Törnebohmite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula Ce₂Al(SiO₄)₂(OH).

It crystallizes in the monoclinic crystal system (space group P2_1/c). It is a member of the Fornacite structural group.

Key properties: Mohs hardness 4.5; specific gravity 4.94; Vitreous luster; optically biaxial.

IMA symbol Tbh-Ce, IMA status: approved, named in 1920.

Found in a contact metamorphosed limestone deposit (BastnÄa s mine, Sweden).

It is found associated with Allanite, cerite, bastnÄa site.

The name refers to Alfred Elis TÄo rnebohm (1838–1911), former Director of the Geological Survey of Sweden, and for its cerium content.

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 T minerals or help write this entry.