Magnesiocarpholite Mineral Data

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General Magnesiocarpholite Information

Help on Chemical  Formula: Chemical Formula: MgAl2Si2O6(OH)4
Help on Composition: Composition: Molecular Weight = 298.46 gm
   Magnesium   8.14 %  Mg   13.50 % MgO
   Aluminum   18.08 %  Al   34.16 % Al2O3
   Silicon    18.82 %  Si   40.26 % SiO2
   Hydrogen    1.35 %  H    12.07 % H2O
   Oxygen     53.61 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgAl2Si2O6(OH)4
Help on Environment: Environment: High-pressure/low-temperature mineral occurring in blueschist metamorphic rocks.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Monticiano-Roccastrada Unit (Verrucano Formation, SouthernTuscany (Monte Leoni and Monte Argentario). Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Mg-dominant member of the carpholite series.
 

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Magnesiocarpholite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6829:1:0.2543
Help on Cell Dimensions: Cell Dimensions: a = 13.726, b = 20.099, c = 5.112, Z = 8; V = 1,410.29 Den(Calc)= 2.81
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C cca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.66(1), 2.59(0.45), 5.02(0.45),
Click Here for Large Magnesiocarpholite Structure Window Crystal Structure:

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Viswanathan K , American Mineralogist , 66 (1981) p.1080-1085, The crystal structure of a Mg-rich carpholite, Locality: southeast Sfinari, West Crete

View Additional jPOWD Structure files for Magnesiocarpholite
[1] [2]
 

Physical Properties of Magnesiocarpholite

Help on Cleavage: Cleavage: [???] Good
Help on Color: Color: Gray green, White.
Help on Diaphaniety: Diaphaniety: Translucent
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luster: Luster: Silky
Help on Streak: Streak: white
 

Optical Properties of Magnesiocarpholite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2135,KC= 0.2225
Help on Optical Data: Optical Data: Biaxial (-), a=1.59, b=1.6, g=1.61, bire=0.0200, 2V(Calc)=88, 2V(Meas)=50-60.
 

Calculated Properties of Magnesiocarpholite

Help on Electron Density: Electron Density:

relectron=2.82 gm/cc
note: rMagnesiocarpholite =2.81 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01719
Boson Index = 0.98281
Help on Photoelectric: Photoelectric:

PEMagnesiocarpholite = 1.46 barns/electron
U=PEMagnesiocarpholite x relectron= 4.12 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Magnesiocarpholite is Not Radioactive

 

Magnesiocarpholite Classification

Help on  Dana Class: Dana Class: 65.1.5.3 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.1)with chains P=2
  (65.1.5)Carpholite group
 
65.1.5.1 Carpholite MnAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.1.5.2 Ferrocarpholite (Fe,Mg)Al2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.1.5.3 Magnesiocarpholite MgAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.1.5.4 Balipholite BaMg2LiAl3Si4O12(OH,F)8 C cca 2/m 2/m 2/m
 
65.1.5.5 Potassic-carpholite! (K,Na,[])(Li,Mn)2Al)4Si4O12(OH)4(F,OH)4 C cca 2/m 2/m 2/m
 
65.1.5.6 Vanadiocarpholite! MnVAl(Si2O6)(OH)4 C cca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/F.03-10 VIII - Silicates
  VIII/F - Inosilicates (chain and band) double chains [Si2O6]4-
  VIII/F.03 - Magnesiocarpholite - Vinogradovite series
 
VIII/F.03-10 Magnesiocarpholite MgAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
VIII/F.03-20 Ferrocarpholite (Fe,Mg)Al2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
VIII/F.03-30 Carpholite MnAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
VIII/F.03-40 Balipholite BaMg2LiAl3Si4O12(OH,F)8 C cca 2/m 2/m 2/m
 
VIII/F.03-50 Lorenzenite Na2Ti2Si2O9 P bcn 2/m 2/m 2/m
 
VIII/F.03-60 Lintisite Na3LiTi2Si4O14·2(H2O) C 2/c 2/m
 
VIII/F.03-70 Vinogradovite (Na,K)4Ti4(Si,Al)8O26·3(H2O,Na) A2/a 2/m
 
VIII/F.03-80 Paravinogradovite! (Na,[])2(Ti,Fe)4(Si2O6)2(Si3AlO10)(OH)4·H2O P1 1
 

Other Magnesiocarpholite Information

Help on References: References: NAME( EurJMin, v 13, p 533) PHYS. PROP.(EurJMin, v 13, p 533) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Magnesiocarpholite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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

Magnesiocarpholite

MgAl2Si2O6(OH)4
Dana No: 65.1.5.3 Strunz No: VIII/F.03-10
Locality:

 

Notes:

 

 
   
 
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