Solid phase
Official name
Molybdic acid
Secondary names
Molybdic(VI) acid; dihydroxy(dioxo)molybdenum; Diammonium dimolybdate; molybdenum trioxide monohydrate; H2MoO4
CAS number
7782-91-4
Type
Family
covalent network solid
Class
sheet covalent network solid
Compound type
oxide
Chemical composition
Formula
$MoO_3 \bullet H_2O$
Chemical formula
MoO3•H2O
Elemental formula
Mo O4 H2
Isotope mixture type
terrestrial abundance
10.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Mo$ Molybdenum element 1 0.2 1 constituent element main
$O$ Oxygen element 3 0.6 1 constituent element main
$H_2O$ Water molecule 1 0.2 1 hydration main
Chemical functions
  Function Number
$R-OH$ 2
Chemical bonds
  Bond Number
$\geq \mid Mo-O-$ 5
$> \mid Mo=O$ 1
$-O-H$ 2
Class
sheet covalent networks (10)
Type
one metal and one non-metal atoms sheet networks (10.04)
Phase type
crystalline
Crystal system
hexagonal
Molar mass
161.95 $g/mol$
Density
3.112 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid MoO3.H2O > 300°C (> 573 K)
Phase transitions comments
a 'monohydrate' (or Mo trioxide dihydrate Mo3.2H2O) exists
Refringence type
uniaxial
Pure color
colorless
Color
colorless, white
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