Mineral phase
- IMA name
- Sauconite
- Class
- silicate mineral
- Compound type
- phyllosilicate
- Formula
- $Na_{0.3}Zn_3.(Si,Al)_4O_{10}(OH)_2 \bullet 4(H_2O)$
- Chemical formula
- Na0.3Zn3(Si,Al)4O10(OH)2•4(H2O)
- Elemental formula
- Na0.3 Zn3 (Al)0-1.5 (Si)2.5-4 (O)12-16 (H)2-10
- Isotope mixture type
- terrestrial abundance
- Composition comments
- Typical formula: $Na_{0.3}Zn_3.(Si_3Al)O_{10}(OH)_2 \bullet 4(H_2O)$ - Common impurities: Ti, Fe, Mn, Cu, Mg, Ca, K
- Oxides
-
Formula $Na_{2}O$ $ZnO$ $Al_{2}O_{3}$ $SiO_{2}$ $H_{2}O$ Mass fraction (%)
Strunz
- Class
- silicates (09)
- Division
- phyllosilicate (09.E)
- Family
- Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets (09.EC)
- Code
- 09.EC.45
Dana
- Major class
- silicates (VIII)
- Class
- phyllosilicate sheets of six-membered rings (71)
- Type
- with 2:1 clays (71.03)
- Group
- Smectite group (Trioctahedral Smectites) (71.03.01b)
- Code
- 71.03.01b.03
- Phase type
- crystalline
- Crystal system
- monoclinic
- Crystal class
- prismatic
- Crystal class symbol
- 2/m (C2h)
- Crystal spacegroup
- C2/m
- Molar mass
- 580.37 $g/mol$
- Density
- 2.45 $g/cm^3$
- State NTP
- solid
- Refringence type
- biaxial
- Refringence sign
- negative
- Birefringence
- 0.040
- Refraction index $n_{\alpha}$
- 1.55 - 1.58
- Refraction index $n_{\beta}$
- 1.59 - 1.62
- Refraction index $n_{\gamma}$
- 1.59 - 1.62
- Pure color
- white
- Color
- bluish white, reddish brown
- Diaphaneity
- translucent
- Luster
- earthy