Oxyyttrobetafite-(Y)

oxyyttrobetafite-(Y)

thorite

thorianite

gadolinite-(Y)

Images

Formula: Y₂Ti₂O₆O
Oxide, betafite group, pyrochlore supergroup, yttrium- and titanium- bearing mineral
Crystal System: Isometric
Specific gravity: 5.54 calculated
Hardness: 5
Streak: White
Colour: Brown
Luminescence: Not fluorescent under UV
Environments

Pegmatites

Oxyyttrobetafite-(Y) is a new mineral, approved in 2022 and to date (November 2023) reported only from the type locality.

Localities

At the type locality, an Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan, oxyyttrobetafite-(Y) occurs as small brown grains in a cylinder–shaped aggregate (2.5 × 0.6 cm) in blocks of albite-rich granite pegmatite. Associated minerals include thorite, thorianite, gadolinite-(Y), albite and aeschynite-(Y) (Mindat).

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