Azurite – Chessylite, Blue Copper Carbonate Composition & Structure
Composition. A basic carbonate of copper, Cu (Cu.OH)2(CO3)2 or 2CuCO3.Cu(OH)2= Carbon dioxide 25,6 cupric oxide 69.2, water 5.2. Copper = 55.3.
Crystallization. Monoclinic. Habit varied. Crystals frequently complex and distorted in development, sometimes in radiating spherical groups.
Structure. Crystallized. In radiating botryoidal structure. Earthy.
Physical Properties. H. = 3.5-4. G.= 3.77. Vitreous luster. Intense azure-blue color. Transparent to opaque.
Tests. Same as for malachite (which see). Characterized chiefly by its azure- blue color.
Occurrence. Origin and associations same as for malachite. Found in fine crystals’ at Chessey, near Lyons, France; in Rumania; at Laurium, Greece; in Siberia; at Broken Hil, New South Wales; in Arizona at Copper Queen Mine Bisbee; at Morenci, Etc. Widely distributed with copper ores. Not so common as malachite.
Name. Named in allusion to its color
Use. An important ore of copper
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