Gasparite-(La)

gasparite-(La)

Images

Formula: La(AsO4)
Arsenate of lanthanum, gasparite group, monazite supergroup
Crystal system: Monoclinic
Specific gravity: 5.558 calculated
Hardness: ~4.5
Colour: Yellow to orange, dark grey under reflected light
Environments

Metamorphic environments

Localities

There are two co-type localities, the Ushkatyn No. 3 deposit, Zhayrem, Karazhal, Ulytau Region, Kazakhstan and the Wanni glacier - Scherbadung area, Binn, Goms, Valais, Switzerland.

At the Ushkatyn No. 3 deposit, Zhayrem, Karazhal, Ulytau Region, Kazakhstan, gasparite-(La) occurs as minute isometric grains up to 15 μm in size in veinlets in the layered manganese ore deposit, associated with friedelite, jacobsite, pennantite, alleghanyite, sonolite, sarkinite, tilasite, retzian-(La), calcite, rhodochrosite and hausmannite (AM 104.10.1469-1480, HOM).

At the Wanni glacier - Scherbadung area, Binn, Goms, Valais, Switzerland, gasparite-(La) occurs in alpine fissures in a two-mica gneiss associated with titanite, quartz and albite (HOM).
Gasparite-(La) from the Wanni glacier - Scherbadung area - Image

Back to Minerals