Solid phase
Official name
alpha-Lead(II) oxide
Secondary names
Lead monoxide; Litharge
CAS number
1317-36-8
Type
Family
covalent network solid
Class
sheet covalent network solid
Compound type
oxide
Chemical composition
Formula
$PbO$
Chemical formula
PbO
Elemental formula
Pb O
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Pb$ Lead element 1 0.5 1 constituent element main
$O$ Oxygen element 1 0.5 1 constituent element main
Chemical bonds
  Bond Number
$-Pb-O\leq$ 4
Class
sheet covalent networks (10)
Phase name
$\alpha-$Lead(II) oxide
Phase type
crystalline
Crystal system
tetragonal
Crystal class
ditetragonal-dipyramidal
Crystal class symbol
4/mmm (D4h)
Crystal spacegroup
P4/nmm
Molar mass
223.20 $g/mol$
Density
9.33 (calc.) $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 1161 K (888°C)
Refringence type
uniaxial
Refringence sign
negative
Birefringence
0.130
Refraction index $n_{\alpha}$
2.665
Refraction index $n_{\beta}$
2.535
Pure color
red
Color
red
Diaphaneity
transparent
Luster
greasy
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