Odikhinchaite aggregates (purple rosettes) in pegmatite with white alkali feldspars, yellow cancrinite and dark green to black aegirine. The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( https://creativecommons.org/licenses/by/4.0/ ). — Photo: Gritsenko, Yuliya D. and Chukanov, Nikita V. and Aksenov, Sergey M. and Pekov, Igor V. and Varlamov, Dmitry A. and Pautov, Leonid A. and Vozchikova, Svetlana A. and Ksenofontov, Dmitry A. and Britvin, Sergey N. · CC BY 4.0
Odikhinchaite
Odikhinchaite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₉Sr₃[(H₂O)₂Na]Ca₆Mn₃Zr₃NbSi(Si₂₄O₇₂)O(OH)₃(CO₃)·H₂O.
It crystallizes in the hexagonal crystal system (space group R3m). It is a member of the Eudialyte structural group.
Key properties: Mohs hardness 5; specific gravity 2.97; White streak; Vitreous luster; optically uniaxial.
IMA symbol Odk, IMA status: approved, named in 2020.
Found in a peralkaline pegmatite vein hosted by melteigite in an ultrabasic alkaline- carbonatite, multistage, ring intrusion.
It is found associated with Orthoclase, albite, aegirine, cancrinite, ancylite-(Ce), catapleiite, wadeite.
The name refers to the discovery locality.