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
- 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