Mineral Factbook

Melanophlogite

C2H17O5·Si46O92IMA symbol: Mpredefined

Melanophlogite is an oxide or hydroxide mineral with the formula C2H17O5·Si46O92, crystallizing in the tetragonal system. It has a calculated density of 1.965 g/cm3. Its streak is white.

Photos

Melanophlogite specimen photo
Didier Descouens · CC BY-SA 4.0 · Commons
Melanophlogite specimen photo
Didier Descouens · CC BY-SA 4.0 · Commons
Melanophlogite specimen photo
Didier Descouens · CC BY 3.0 · Commons
Melanophlogite specimen photo
Didier Descouens · CC BY-SA 4.0 · Commons

Crystallography

Crystal systemtetragonal crystal systemWikidata (CC0)
Space groupP m -3 n
Cell (Å, °)a = 13.399, b = 13.399, c = 13.399; α = 90, β = 90, γ = 90
Cell volume2405.56 ų, Z = 2
Axial ratios1.0000:1:1.0000calculated from COD 9010371
Source structureCOD 9010371 (American Mineralogist, 2008) — 1 of 3 structures

Powder X-ray diffraction (calculated)

2θ (degrees, Cu Kα1)I/I₀ (max 100)
d (Å)3.5815.9925.473.8683.253.716
I/I₀10099.277.140.127.125.8

xrd-v1: CuKa1 1.5406A, 2theta 5-90, top10, Imax=100, no DW/PO. Computed from COD 9010371; idealized occupancies, no preferred orientation.

Physical properties

Density (calculated)1.965 g/cm³calculated from COD 9010371
Streak
whitesingle sourceWikidata (CC0)

Chemistry (calculated)

Molecular weight2885.03 g/molcalculated from the IMA formula
Composition (wt%)C 0.83%, H 0.59%, O 53.79%, Si 44.78%

Classification

Nickel-Strunz (10th)4.DA.25Wikidata (CC0)
Nickel-Strunz (9th)4.DA.25Wikidata (CC0)
Dana (8th)75.2.2.1Wikidata (CC0)