Mineral phase
IMA name
Vlasovite
Class
silicate mineral
Compound type
inosilicate
Formula
Na2ZrSi4O11
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
(SiO4)4 1
Chemical bonds
  Bond Number
SiO 4
Oxides
Formula Na2O ZrO2 SiO2
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/cm3
State NTP
solid
Refringence type
biaxial
Refringence sign
negative
Birefringence
0.0210
Refraction index nα
1.607
Refraction index nβ
1.623
Refraction index nγ
1.628
Pure color
colorless
Diaphaneity
transparent
Luster
greasy