Phosphates: Farmacol
Diagnostic Card.
Ca H (AsO 4) 2 * H 2 O
Crystal system monoclinic
Hardness 2-2.5
Specific gravity 2.6
Cleavage is very easily seen
Colour colorless, white, light gray
Gloss glass, silky
Farmacol presented aggregates of needles, fibers or small masses natёchnymi reniform or stalactite appearance. Coloring is often absent, but may be white or light gray. Gloss glass or silky. In flame oxidation a swelling melts and turns into a white enamel. Readily dissolves in acids, but insoluble in water.
The chemical composition - content (%): CaO - 23-26; As2O5 - 50 - 53; H2O- 20 - 23. Luster - glass, pearl effect on the cleavage planes. Transparency - Good crystals are transparent. Fracture - uneven. Flexible in thin plates. Cleavage - by {010} perfect. Aggregates - Thin silky fibers or needle beams; and also aciniform stalaktitopodobny. Occasionally small crystals, flattened on {010} or needle along the [001].
Origin.
It occurs together with other arsenate in the zone of oxidation of deposits of minerals with arsenic, especially gaydingeritom.
Place of Birth.
The presence farmakolita have data fields Wittich in the Black Forest, in the Harz, Jáchymov in Bohemia (Czech Republic), in Sainte-Marie-au-Maine in Alsace, in Nevada, and (in association with erythrite) in California.
- Gatchell - "New Almadén snag" - arsenide and antimony sulfide (modern sulphosalts)
- Antimony - toxic metal (semi-metal) are widely used in industry, medicine and engineering
- Zirconium - a rare and non- metal and dangerous jewel in the oxide and salts
- Gold - yellow dangerous and toxic metal -date and accurate digital cable technology
- Sulphur - a golden-yellow toxic substance and a sign of volcanic activity
- Cadmium - a toxic uncirculated unknown wide range of people silvery metal
- Lead - a poisonous gray simulator silver metal and toxic metal snag
- Arsenic - poison classic medieval and modern poisoners and medicine in medicine
Toxic and hazardous radioactive rocks and minerals
** - Poisonous stones and minerals (obligatory check in chemical laboratory + clear indication of toxicity)
** - Radioactive rocks and minerals (obligatory check on a regular dosimeter + ban on the open sale of radioactivity in the event of more than 24 mR / hour + additional measures to protect the population)
Catalog minerals and gems in groups of the world
** - Poisonous stones and minerals
** - Radioactive rocks and minerals
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