Constituent
Name
WO3•(H2O)
Official name
Tungstic acid
Family
covalent network solid
Class
sheet covalent network solid
Compound type
tungstate
Constituent abundance in material
Relevance
main - major
Arrangement
single phase
Mass fraction
1.0
Mole fraction
1.0
Chemical composition
Formula
$WO_3 \bullet (H_2O)$
Chemical formula
WO3•H2O
Elemental formula
W O4 H2
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$W$ Tungsten 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 Relevance
$R-OH$ 2 main
Chemical bonds
  Bond Number Relevance
$\geq\mid W-O$ 6
$-O-H$ 2 main
Class
molecular solids with hydrogen bonded molecules (03)
Type
polymolecular H-bonded solids with H2O (hydrates) (03.02)
Group
Mono-hydrates (03.02.02)
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pmna
Texture
polycrystalline
Molar mass
249.85 $g/mol$
Density
5.59 $g/cm^3$
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.17
Refraction index $n_{\alpha}$
2.09
Refraction index $n_{\beta}$
2.24
Refraction index $n_{\gamma}$
2.26
Diaphaneity
translucent to subtranslucent
Luster
earthy