Melanophlogite Mineral Data + Say MELANOPHLOGITE

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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 Synonym: Synonym: ICSD 30791
  Melanophlogite-alpha
  PDF 27-7
 

Melanophlogite Image

Click Here for Larger Melanophlogite Image in a New Browser Window Images:
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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 DipyramidalH-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),
Click Here for Large Melanophlogite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate

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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above


Nakagawa T , Kihara K , Harada K , American Mineralogist , 86 (2001) p.1506-1512, The crystal structure of low melanophlogite

View Additional jPOWD Structure files for Melanophlogite
[1]
 

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 Diaphaniety: Diaphaniety: 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.
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
Help on Optical Data: Optical Data: Isotropic, n=1.425-1.457.
 

Calculated Properties of Melanophlogite

Help on Electron Density: Electron Density:

relectron=2.03 gm/cc
note: rMelanophlogite =2.02 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02098
Boson Index = 0.97902
Help on Photoelectric: Photoelectric:

PEMelanophlogite = 1.73 barns/electron
U=PEMelanophlogite x relectron= 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: 75.2.2.1 (75)Tectosilicate Si Tetrahedral Frameworks
  (75.2)SiO2 with H2O and organics
  (75.2.2)Melanophlogite Polymorphs
 
75.2.2.1 Melanophlogite SiO2·n(C,H,O,S) P 41/nbc 4/m 2/m 2/m
 
75.2.2.2 Melanophlogite-beta! SiO2·n(C,H,O,S) P m3n 4/m 3 2/m
Help on  Strunz Class: Strunz Class: IV/D.01-40 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.01 - Quartz group
 
IV/D.01-10 Quartz SiO2 P 3121,P 3221 3 2
 
IV/D.01-20 Tridymite SiO2 F1 1
 
IV/D.01-30 Cristobalite SiO2 P 41212 4 2 2
 
IV/D.01-35 Moganite! SiO2 I2/a 2/m
 
IV/D.01-40 Melanophlogite SiO2·n(C,H,O,S) P 41/nbc 4/m 2/m 2/m
 
IV/D.01-40* Melanophlogite-beta! SiO2·n(C,H,O,S) P m3n 4/m 3 2/m
 
IV/D.01-50 Coesite SiO2 C 2/c 2/m
 
IV/D.01-60 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m
 
IV/D.01-70 Lechatelierite* SiO2 None
 
IV/D.01-80 Opal SiO2·n(H2O) None
 

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 - Applied Mineralogy 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 - Mineral and Gemstone Kingdom 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - WWW-MINCRYST 17 -Zeolite Database by Bruno Herreros 18 -École des Mines de Paris

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

Melanophlogite

SiO2·n(C,H,O,S)
Dana No: 75.2.2.1 Strunz No: IV/D.01-40
Locality:

 

Notes:

 

 
   
 
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