Pyromorphite         

Pb5(PO4)3X

 [X = Cl, F,or OH]

Specimen from Yangshuo, Guangxi, China

University of Cincinnati Mineral Collection

Specimen from unknown locality

University of Cincinnati Mineral Collection

(Click images to enlarge)

Reflected light photomicrograph

Scanning Electron Microscope image (FEI XL 30 ESEM)

Crystal System

Specific

 gravity

Hardness

Color

Hexagonal

6.85

3½ - 4

Green, yellow, brown, grayish white

Composition

Formula weight = 1356.37 g/mole

 

 

    Pb

76.38 %

    PbO

82.2 %

 

    O

14.15

 

 

 

    P

  6.85

    P2O5

15.7

 

    Cl

  2.61

    Cl

  2.6

 

Web resources:

http://webmineral.com

http://www.mindat.org/

 

  Pyromorphite in water distribution systems

 

Lead service branch, utility 01. Chloramine disinfection, phosphate corrosion control.

 

Scanning Electron Microscope image, utility 01  (FEI XL 30 ESEM)

Scanning Electron Microscope image, utility 01  (FEI XL 30 ESEM)

 

Scanning Electron Microscope image, utility 10 (FEI XL 30 ESEM)