Uedaite-(Ce)
Uedaite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula Mn²⁺CeAl₂Fe²⁺(Si₂O₇)(SiO₄)O(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Epidote structural group.
Key properties: Mohs hardness 5–6; specific gravity 4.19; Gray streak; Vitreous luster; optically biaxial.
IMA symbol Ued-Ce, IMA status: approved, named in 2006.
An accessory mineral in granite.
It is found associated with Allanite-(Ce), monazite-(Ce), zircon, thorite, bastnaesite-(Ce).
The mineral was named to honor Tateo Ueda (1912–2000), who was the first to solve the crystal structure of allanite.
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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