UDC 549:291,33
LBC 86.41:26.31
  K.305

RUS language
RUS
 

Stone, minerals and semiprecious of the world stone
Phosphate: Pharmacolite -->rus

   Diagnostic cart.

   Ca H (AsO4) * 2 H2O
   Crystal structure monoclinic
   Hardness on the Mohs scale 2-2,5
   Specific unit weight mass 2,6
   Cleavage shows up as easy as anything
   Colors colourless, white, light-grey
   Glance (glitter, glare) glassy, silky

   Pharmacolite is presented the aggregates of needle-shaped crystals-fibres or little wandering the masses of bud-like or stalactite type. Colouring non-existent often, but can be white or light-gray. Glance (glitter, glare) glassy or silky. In oxidizing flame melt fuse with intumescing and grows into a white enamel. Easily dissolves in acids, but insoluble in water.

   Chemical composition (chemistry, compound) is maintenance (in %): CAO - 23-26; As2O5 - 50 - 53; H2O- 20 - 23. Glance (glitter, glare) - glassy, on the planes of cleavage of mother-of-pear nacreous. Transparency - the Good crystals are transparent. Fracture, break - uneven. Flexible in thin plates. Cleavage - on {010} perfect absolute. Aggregates are the Thin silky fibres or needle-shaped bunches; also cluster-like and stalactitic-like. Rarely small crystals, flatten to on {010} or needle along [001].

   Origin provenance genesis.

   Be found together with other arsenate in the area of oxidization of deposits together with the minerals of arsenic, especially with a haidingerite.

   Deposit minefield mine field occurrence subsoil.

   About the presence of Pharmacolite there is information on the deposits of Vittikhen in Shvarcvalde, in Garce, Yakhimove in Bohemia (Czekh), in Saint-Mario-Man, in Elzase, in Nevada and (in an association with Eritrine) in California (USA).