Lead (II) oxide PbO

Lead (II) oxide PbO

Lead (II) oxide forms the crystals of two modifications:

1) α-modification, yellow lead, stable to 489 ° C, red crystals of tetragonal crystal system;
2) β-modification, a massicot is stable at the temperature above 489 ° С and metastable at room temperature, yellow crystals of rhombic crystal system. 

It reacts with acids. The melting point is 886 ° C.

Characteristics

#

Name

Norm

1

Mass fraction of PbO, %, not more

98,7

2

Mass fraction of metal lead (Pb), %, not more

0,50

3

Mass fraction of PbO2, %, not more

0,2

4

Mass fraction of Fe, %, not more

0,005

5

Mass fraction of substances insoluble in HNO3+H2O2, %, not more   

0,04

6

Water content and volatile substances content, %, not more

0,3

7

Residual, %, not more, on a grid sieve:
0063
016
014


0,5
no