Figure 3. (a) BSE image of a qeltite crystal. (b–c) Optical images of the same qeltite crystal showing pleochroism changing from light brown (~ ‖ Z) to dark brown with a red hue (~⊥ Z). Key: Baf – barioferrite; Fap – fluorapatite; Gh – gehlenite; Qlt – qeltite; Rnk – rankinite. The abbreviations are after Warr (Reference Warr2021). 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: Galuskina IO, Stachowicz M, Vapnik Y, Zeliński G, Woźniak K, Galuskin E. · CC BY 4.0
Qeltite
Qeltite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₃TiSi₂(Fe³⁺₂Si)O₁₄.
It crystallizes in the hexagonal crystal system (space group P321). It is a member of the Paqueite structural group.
IMA status: approved, named in 2021.