Mineral Factbook

Marialite

Na4Al3Si9O24ClIMA symbol: Margrandfathered

Marialite is a silicate mineral with the formula Na4Al3Si9O24Cl. It has a Mohs hardness of 5.5-6.6, typically colorless or white in color, with a vitreous luster, a specific gravity of 5.18. Its streak is white.

Photos

Marialite specimen photo
Géry PARENT · Public domain · Commons
Marialite specimen photo
Géry PARENT · Public domain · Commons
Marialite specimen photo
Eric Polk · CC BY-SA 4.0 · Commons
Marialite specimen photo
Koreller · CC BY-SA 4.0 · Commons

Crystallography

Space groupP 42/n :2
Cell (Å, °)a = 12.07899, b = 12.07899, c = 7.583467; α = 90, β = 90, γ = 90
Cell volume1106.44 ų, Z = 2
Axial ratios1.0000:1:0.6278calculated from COD 9015798
Source structureCOD 9015798 (The Canadian Mineralogist, 2011) — 1 of 17 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.4663.0643.822.6913.023.556
I/I₀10073.641.140.235.318.2

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9015798; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)2.633 g/cm³calculated from COD 9015798
Hardness (Mohs)
5.5-6.6single sourceDana, System of Mineralogy, 6th ed. (1892)
Specific gravity
5.18 g/cm3single sourceDana, System of Mineralogy, 6th ed. (1892)
Color
colorless, whitesingle sourceDana, System of Mineralogy, 6th ed. (1892)
Streak
whitesingle sourceWikidata (CC0)
Luster
vitreoussingle sourceDana, System of Mineralogy, 6th ed. (1892)

Chemistry (calculated)

Molecular weight845.11 g/molcalculated from the IMA formula
Composition (wt%)Na 10.88%, Al 9.58%, Si 29.91%, O 45.44%, Cl 4.2%

Classification

Nickel-Strunz (10th)9.FB.15Wikidata (CC0)
Nickel-Strunz (9th)9.FB.15Wikidata (CC0)