Mineral phase
IMA name
Vlasovite
Class
silicate mineral
Compound type
inosilicate
Formula
$Na_2ZrSi_4O_{11}$
Chemical formula
Na2ZrSi4O11
Elemental formula
Na2 Zr Si4 O11
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Na$ Sodium element 2 constituent element main
$Zr$ Zirconium element 1 constituent element main
$Si$ Silicon element 4 constituent element main
$O$ Oxygen element 11 constituent element main
Chemical functions
  Function Number
$(SiO_4)^{4-}$ 1
Chemical bonds
  Bond Number
$\geq Si-O^-$ 4
Oxides
Formula $Na_{2}O$ $ZrO_{2}$ $SiO_{2}$
Mass fraction (%) 14.56 28.96 56.48

Strunz

Class
silicates (09)
Division
inosilicate (09.D)
Family
with 6-periodic single chains (09.DM)
Code
09.DM.25

Dana

Major class
silicates (VIII)
Class
inosilicate double-width unbranched chains, w=2 (66)
Type
with P=2 non-amphibole configuration (66.02)
Group
Dana group (Vlasovite) (66.02.02)
Code
66.02.02.01
Phase type
crystalline
Crystal system
monoclinic
Crystal class
prismatic
Crystal class symbol
2/m (C2h)
Crystal spacegroup
C2/c
Molar mass
425.54 $g/mol$
Density
2.97 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.0210
Refraction index $n_{\alpha}$
1.607
Refraction index $n_{\beta}$
1.623
Refraction index $n_{\gamma}$
1.628
Pure color
colorless
Diaphaneity
transparent
Luster
greasy