Mineralogy Database

Melanophlogite Mineral Data

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General Melanophlogite Information

Help on Chemical  Formula: Chemical Formula: SiO2•n(C,H,O,S)
Help on Composition: Composition: Molecular Weight = 2,929.11 gm
   Silicon   44.11 %  Si   94.36 % SiO2
   Hydrogen   0.78 %  H     6.95 % H2O
   Carbon     0.82 %  C
   Sulfur     0.55 %  S     1.09 % SO2
   Oxygen    53.75 %  O
            ______        ______ 
            100.00 %      102.40 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: 46(SiO2)C2H22.6O5.4(SO2)0.5
Help on Environment: Environment: A late-stage, low-temperature mineral with large, clathrate voids which host CH4, CO2, and N2. Stable below 40-65 deg. C.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1876
Help on Locality: Locality: In Italy, at Solfatara Giona, Racalmuto, and at Caltanissetta, Sicily. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "black" and "to be burned" in allusion to the fact that some specimens blacken on heating. Low temperature form.
Help on Name Pronunciation: Name Pronunciation: Melanophlogite + Pronunciation Say MELANOPHLOGITE
Help on Synonym: Synonym: ICSD 30791
  Melanophlogite-alpha
  PDF 27-7
 

Melanophlogite Image

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  Melanophlogite

Comments: Yellow, transparent Melanophlogite crystals.
Location: Racalmuto, Sicily, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Melanophlogite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.5
Help on Cell Dimensions: Cell Dimensions: a = 26.79, c = 13.395, Z = 4; V = 9,613.65 Den(Calc)= 2.02
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 41/nbc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.99(1), 3.58(0.9), 5.471(0.7),
 

Physical Properties of Melanophlogite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Colorless, Light yellow, Dark reddish brown.
Help on Density: Density: 1.99 - 2.11, Average = 2.04
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 6.5-7 - Pyrite-Quartz
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak gray-white, Long UV=gray-white.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Melanophlogite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2183,KPDmeas= 0.2151,KC= 0.2228
Ncalc = 1.44 - 1.47
Help on Optical Data: Optical Data: Isotropic, n=1.425-1.457.
 

Calculated Properties of Melanophlogite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.03 gm/cc
note: Specific Gravity of Melanophlogite =2.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMelanophlogite = 1.73 barns/electron
U=PEMelanophlogite x rElectron Density= 3.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Melanophlogite is Not Radioactive
 

Melanophlogite Classification

Help on  Dana Class: Dana Class: 75.02.02.01 (75)Tectosilicate Si Tetrahedral Frameworks
  (75.02)SiO2 with H2O and organics
  (75.02.02)Melanophlogite Polymorphs
 
75.02.02.01 Melanophlogite SiO2•n(C,H,O,S) P 41/nbc 4/m 2/m 2/m
 
75.02.02.02 Melanophlogite-beta! SiO2•n(C,H,O,S) P m3n 4/m 3 2/m
 
75.02.02.03 IMA2008-067! SiO2•n(CH4,C2H6,C3H8,C4H10);(nmax=3/17) Fd3 2/m 3
Help on  Strunz Class: Strunz Class: 04.DA.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DA -With small cations
 
04.DA.25 Melanophlogite SiO2•n(C,H,O,S) P 41/nbc 4/m 2/m 2/m
 
04.DA.25 IMA2008-067! SiO2•n(CH4,C2H6,C3H8,C4H10);(nmax=3/17) Fd3 2/m 3
 
04.DA.25 Melanophlogite-beta! SiO2•n(C,H,O,S) P m3n 4/m 3 2/m
 

Other Melanophlogite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Melanophlogite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
18 - Zeolite Database by Bruno Herreros

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Print or Cut-and-Paste your Melanophlogite Specimen Label here :

Melanophlogite

SiO2•n(C,H,O,S)
Dana No: 75.02.02.01 Strunz No: 04.DA.25
Locality:

 

Notes:

 

 
   
 


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