Chrome yellow

/ krome   yel • low /

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How Chrome yellow is made:

Origin: artificial identical with the rare mineral crocoite (at Mineralogy Database)
  Chrome yellow is artificially prepared, but is identical to the rare mineral:

Artificial variety of pigment Precipitation of neutral solutions of lead salts with chromate or bichromate solutions.
In the lab
Materials needed: lead(II)-nitrate (Pb(NO3)2), potassium chromate (K2CrO4)
Safety (MSDSs): lead(II)-nitrate, potassium chromate (at Fisher Scientific)
Method: 5,1 g Pb(NO3)2 and 3 g K2CrO4 are each solved in 30 ml deionized water and both solutions are poured together. The resulting precipitate is filtered off and dried at room temperature.

The ground pigment:

Pile of ground Chrome yellow