Halides: Carnallite
Diagnostic card.
K MgCl 3 * 6 (H 2 O)
Diamond orthogonality
Hardness 1-2
Specific weight 1.6
Cleavage is absent
Cracked shell
Color is colorless, white, red, yellow, brown
Color in powder white
Glitter is glassy, greasy
Usually found in the form of dense grainy masses. Its rare crystals have a typical pseudohexagonal appearance. The gloss is mostly greasy. The mineral is colorless, grayish white, sometimes reddish, often with internal metallic irisation, which is due to the presence of the smallest particles of hematite.
Chemical composition. Magnesium (Mg) 8.7%, potassium (K) 14.1%, chlorine (Cl) 38.3%, water (H2O) 38.9%. A specific feature of carnallite is the burning salty taste; It is strongly hygroscopic. The shape of the crystals. Crystals are extremely rare, have a pseudohexagonal appearance. Class of symmetry. Rhombo-bipyramidal - mmm. The ratio of the axes. 0.593: 1: 1.384. Cleavage. Absent. Aggregates. Massive coarse aggregates and masses.
Diagnostic signs.
It is soluble in water and easily melts. The taste is bitter-salty.
Origin.
Carnallite, like common salt, is a halide typical for deposits of evaporites. It is present in them together with kieserite, anhydrite, sylvite, halite, polygalite.
Deposits and applications.
Classical deposits are in Saxony and Hesse. In Italy, carnallite is found (including in the form of good crystals) in the Sicilian mines of potassium salts together with cainite.
Carnallite. Parallel-staggered veins. Sample size 21 cm. Underground mine # 2, deposit Stebnik, Prykarpattya, Ukraine.
- Ghetchellit - "New Almaden blend" - arsenide and antimony sulfide (modern sulfosol)
- Antimony is a toxic metal (semimetal) , widely used in metallurgy, medicine and engineering
- Zirconium - a rare and undiscovered metal and the most dangerous precious stone in oxide and salt
- Gold - yellow dangerous and poisonous metal of modern accurate digital and cable technologies
- Sulfur is a golden-yellow toxic substance and a sign of active volcanic activity
- Cadmium is an undisputed toxic silvery metal unknown to a wide range of people
- Lead - a toxic gray imitator of metallic silver and toxic metal blende
- Arsenic is a classic poison of medieval and modern poisoners and medicine in medicine
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
Comments
When commenting on, remember that the content and tone of your message can hurt the feelings of real people, show respect and tolerance to your interlocutors even if you do not share their opinion, your behavior in the conditions of freedom of expression and anonymity provided by the Internet, changes Not only virtual, but also the real world. All comments are hidden from the index, spam is controlled.