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[Chromium (Cr)]
 
   In 1761, Johann Gottlob Lehmann found an orange-red mineral in the Ural Mountains which he named Siberian red lead. Though misidentified as a lead compound with selenium and iron components, the material was in fact lead chromate (PbCrO4), now known as the mineral crocoite. In 1770, Peter Simon Pallas visited the same site as Lehmann and found a red "lead" mineral that had very useful properties as a pigment in paints. The use of Siberian red lead as a paint pigment developed rapidly. A bright yellow made from crocoite became a very fashionable color.
index: [Chromium (Cr)]
 
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  Biology & Environmental effects
    Biology  .....[1Page More]
    Environmental effects  .....[1Page More]

  Conclusion  .....[1Page More]
    Comparison between national positions of the mines and the global one  .....[1Page More]
    Determining the investment rate, time & capacity of operation  .....[1Page More]
    Economic studies  .....[1Page More]
    Employment  .....[1Page More]
    Exploitation studies  .....[1Page More]
    Exploration studies  .....[1Page More]
    Investigating the supply& demand
   Comparison between price & consumption changes of Chromium in past & future   .....[1Page More]
   Investigating the national & global prices  .....[1Page More]
   Investigating the supply& demand in Iran  .....[1Page More]
   Predicting the future supply& demand of Chromium in the world  .....[1Page More]
   Production& Consumption changes and its balance in past  .....[1Page More]
    Mineral - Processing studies

  General Properties of Chromium  .....[1Page More]
    Composing minerals  .....[1Page More]
    History  .....[1Page More]
    Properties of Chromium  .....[1Page More]
   Chemical properties  .....[1Page More]
   Crystallographic properties  .....[1Page More]
   Mechanical& Physical properties  .....[1Page More]

  Geology of Chromium  .....[1Page More]
    Different types of composing ore deposits  .....[1Page More]
    Formation conditions & genesis of Chromium  .....[1Page More]
    Geology & diffusion of Chromium in Iran   .....[1Page More]

  Investigating the Status of Chromium in Iran & World
    Investigating the exports of Chromium
   Iran exports rate of Chromium   .....[1Page More]
   World exports rate of Chromium  .....[1Page More]
    Investigating the imports of Chromium
   Iran imports rate of Chromium   .....[1Page More]
   world imports rate of Chromium  .....[1Page More]
    Investigating the prices of Chromium
   Investigating the global prices of Chromium  .....[1Page More]
   Investigating the national prices of Chromium   .....[1Page More]
    Production of Chromium
   Investigating the Production& mineral- processing of Chromium in Iran  .....[1Page More]
   Main producing companies& industries of Chromium in world
   Main producing countries of Chromium  .....[1Page More]
   Production trend & rate of Chromium in world
    Reserves of Chromium
   Issued exploration certificates & in-process Projects   .....[1Page More]
   Main potentials& Reserves of Chromium in Iran  .....[1Page More]
   Main reserves of Chromium in the world  .....[1Page More]
    Significant consumptions of Chromium  .....[1Page More]
   Consuming Industries of Chromium in Iran   .....[1Page More]
   Issued agreements in principle & in-process projects  .....[1Page More]
    The exploration, extraction & mineral- processing methods of Chromium
   The exploration main methods of Chromium  .....[1Page More]
   The extraction main methods of Chromium  .....[1Page More]
   The mineral- processing main methods of Chromium  .....[1Page More]

  References  .....[1Page More]
 
 
 
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Atomic Number: 24
Atomic Weight: 51
Density:
7/19gr/cm3
Hardness: 8/5
Color: Black-gray
Streak: -
Luster: -
Period:
4
Table Group:
6(VI)
Series:
Transition m.
 
 
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