Phosphates: Carnot
Diagnostic Card.
K 2 (UO 2)2 (VO 4) 3 * 2 H 2 O
Crystal system monoclinic
Hardness 4
The proportion of 4.5-4.6
Cleavage is perfect
fracture brittle
Colour yellow, greenish-yellow
Powder color from yellow to green
Luster pearly, silky, matt
Carnot belongs to a group of uranium slyudok - potassium vanadate and uranium. Gloss dull (earthy masses) pearl on the cleavage planes; It is transparent to translucent. Colours: kanareechno- or lemon-yellow (bright and fairly catchy). The break step, uneven.
Cleavage very perfect; highly radioactive. It occurs as disseminations in sandstone (therefore dangerous), sometimes forms raids and brown. Oxidation products of primary uranium minerals and vanadium. The crystals (monoclinic system) small, usually poorly educated, more earthy and powdery mass. The important uranium ore and vanadium. Deposits: in the United States (Colorado pcs.), Canada, Mexico, Morocco, Shaba (Zaire), Australia.
The name after the French mining engineer and chemist MA Carnot. Carnot very rarely forms crystals having a tabular shape and small size. Usually it is presented powdery masses or patches of bright yellow color in the sandstone in Colorado, Utah, Arizona and New Mexico ( "Colorado Plateau"), where they form a field of great importance.
Diagnostic features.
Mineral tugoplavok, but dissolves in acids; radioactive. Carnot does not collect.
Origin.
It is found in sedimentary rocks in which water is deposited, enriched uranium (hydrothermal).
Deposits and application.
Outside the United States carnotite present on deposits of the same type. First of all, it's average CIS Asia (Uzbekistan, Turkmenistan). Good crystals found in pinkish sandstone Shaba (Africa, Zaire). In Australia, the field Radium Hill observed plaque carnotite David, which is a product of the last change. Carnot - one of the main ore of uranium and vanadium.
Carnot. Long Park, Uravan distro., Paradox Valley, Montrose County, Colorado, USA. Rudny area Uravan - place opening carnotite Photo: © AA Evseev.
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