Thorutite
Thorutite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Th,U,Ca)Ti₂(O,OH)₆.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Brannerite structural group.
Key properties: Mohs hardness 5–6; specific gravity 5.82; Pale brown streak; Resinous luster.
IMA symbol Thu, grandfathered status — known before the IMA’s founding, named in 1958.
Found in veins of microcline and sericitized nepheline, in a syenite massif.
It is found associated with Thorite, zircon, calcite, barite, galena.
The name refers to the composition, THORium, Uranium, and TItanium.
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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