Mineral phase
IMA name
Pascoite
Type
Class
non-silicate mineral
Compound type
vanadate
Chemical composition
Formula
$Ca_3V_{10}O_{28} \bullet 17(H_2O)$
Chemical formula
Ca3V10O28•17(H2O)
Elemental formula
(Ca2+)3 V10 O45 H34
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Ca^{2+}$ Calcium cation element 3 constituent cation main
$V$ Vanadium element 10 constituent element main
$O$ Oxygen element 28 constituent element main
$H_2O$ Water molecule 17 hydration main
Chemical functions
  Function Number
$R-OH$ 2
Chemical bonds
  Bond Number
$V-O$ 50
$-O-H$ 2
Oxides
Formula $CaO$ $V_{2}O_{5}$ $H_{2}O$
Mass fraction (%) 12.16 65.71 22.13

Strunz

Class
oxides - hydroxides - arsenites (04)
Division
V[5+,6+] vanadates (04.H)
Family
[6]-Sorovanadates (04.HC)
Code
04.HC.05

Dana

Major class
phosphates, arsenates, vanadates (VII)
Class
vanadium oxysalts (47)
Type
Anhydrous Containing Hydroxyl or Halogen (47.02)
Group
Pascoite group (47.02.01)
Code
47.02.01.01
Phase type
crystalline
Crystal system
monoclinic
Crystal class
prismatic
Crystal class symbol
2/m (C2h)
Crystal spacegroup
C2/m
Molar mass
1383.89 $g/mol$
Density
1.87 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.050
Refraction index $n_{\alpha}$
1.775
Refraction index $n_{\beta}$
1.815
Refraction index $n_{\gamma}$
1.825
Dispersion V
r > v very strong
Pure color
yellow-orange
Color
yellow brown, yellow orange, red orange
Diaphaneity
translucent
Luster
vitreous
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