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hematite (Fe2O3)
Keterangan
Hematite is an important ore of iron and its blood red color (in the powdered form) lends itself well to use as a pigment. Hematite gets its name from a Greek word meaning blood-like because of the color of its powder. Ancient superstition held that large deposits of hematite formed from battles that were fought and the subsequent blood that flowed into the ground. Crystals of Hematite are considered rare and are sought after by collectors as are fine Kidney Ore specimens.
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Hematite
Spesifikasi Produk
Chemical Formula: Fe2O3, Iron Oxide Class: Oxides and Hydroxides Group: Hematite Uses: Very important ore of iron, as a pigment and as mineral specimens. Physical caracteristics : Color is steel or silver gray to black in some forms and red to brown in earthy forms. Sometimes tarnished with iridescent colors when in a hydrated form (called Turgite). Luster is metallic or dull in earthy and oolitic forms. Transparency: Crystals are opaque. Crystal System is trigonal; bar 3 2/m Crystal Habits include tabular crystals of varying thickness sometimes twinned, micaceous (specular), botryoidal and massive. also earthy or oolitic. Cleavage is absent. However, there is a parting on two planes. Fracture is uneven. Hardness is 5-6 Specific Gravity is 5.3 (slightly above average for metallic minerals) Streak is blood red to brownish red for earthy forms. Best Field Indicators are crystal habit, streak and hardness.
Aplikasi
Very important ore of iron, as a pigment and as mineral specimens.
Bahan Baku
Hematite, also spelled as haematite, is the mineral form of iron(III) oxide (Fe2O3), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950 °C.
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