Sulphates: Kreunkit (Krenkit)
Diagnostic card.
Na 2 Cu (SO 4 ) 2 * 2 (H 2 O)
Singonia monoclinic
Hardness 2,5-3
Specific weight 2.9
Cleavage is easily manifested
Blue color
Color in powder white
Glitter glass
Forms dense masses of fibrous or granular structure, or aggregates and crystal brushes; Sometimes elongated-prismatic crystals are observed. Their shine is glassy, the color is sky-blue to pale blue with a tendency to light-greenish.
Origin.
This rare secondary mineral is found in some sulfide deposits in desert regions in association with antlerite, pallidum, atakamit, calhantite, with which it is easily confused.
Place of Birth.
Found in Chuikikamata and Ketena in Chile. In Italy it is noted in Capo Kalamita on the island of Elba.
Krenkit. Chuquisamata, Chile. 12х5 cm. Photo: © А.А. Evseev.
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Poisonous and radioactive dangerous stones and minerals
** - poisonous stones and minerals (mandatory check in the chemical laboratory + explicit indication of toxicity)
** - radioactive stones and minerals (mandatory check on the standard dosimeter + ban on open sales in case of radioactivity exceeding 24 milli / g / h + additional measures of population protection)
Catalog of minerals and semi-precious stones of the world by groups
** - poisonous stones and minerals
** - radioactive stones and minerals
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