Lead chromate native

Crocoisite, crocolite, crocoite Native lead chromate mineral of red color. 

Chromate op Potassa.—This salt, though much more important as a compound of chromium than of potassium, yet requires to be noticod under this head. The metal, chromium, so called from its tendency to produce colored salts, the name being derived from the Greek word signifying color, was discovered by VaUQUElin in 1797, in the examination of red chromate of lead from Siberia. The most important native compound... 

Bichromate of lead, 2 Pb 0 -H Cr 0, is found native, as the red-lead ore, forming beautiful red crystals. It may also be formed by fusing the neutral chromate of lead with nitrate of potash, or by boiling carbonate of lead with chromate of potash and is much used as a paint. 

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