Moxuanxueite

moxuanxueite

bobtraillite

baddeleyite

calcioancylite-(La)

Images

Formula: NaCa₆Zr(Si₂O₇)₂OF₃
Sorosilicate (Si₂O₇ groups), wöhlerite group, zirconium-bearing mineral
Crystal System: Triclinic
Specific gravity: 3.231 calculated
Hardness: 5½
Streak: White
Colour: Light yellow to yellow-brown
Environments

Plutonic igneous environments

Moxuanxueite is a new mineral, approved in 2020 and to date (August 2025) reported only from Gejiu City.

Localities

At the Moxuanxueite type locality, Gejiu Sn-polymetallic ore field, Gejiu City, Honghe, Yunnan, China, moxuanxueite occurs as subhedral to euhedral polysynthetic twinned grains, and as elongate crystals up to 1 mm in size, commonly associated with tiny baddeleyite at the grain margins and usually associated with calcioancylite-(La), bobtraillite, catapleiite, fluorite and jadeite. Moxuanxueite is light yellow in colour with a metallic lustre, very brittle with a conchoidal fracture (AM January 2025).

Back to Minerals