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Carpholite Mineral Data

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General Carpholite Information

Help on Chemical  Formula: Chemical Formula: MnAl2Si2O6(OH)4
Help on Composition: Composition: Molecular Weight = 329.10 gm
   Manganese  16.69 %  Mn   21.56 % MnO
   Aluminum   16.40 %  Al   30.98 % Al2O3
   Silicon    17.07 %  Si   36.51 % SiO2
   Hydrogen    1.23 %  H    10.95 % H2O
   Oxygen     48.62 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Al2Si2O6(OH)4
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1817
Help on Locality: Locality: Schlaggenwald, Bohemia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek karfos - "straw" and lithos - "stone."
Help on Synonym: Synonym: ICSD 34520
  PDF 19-273
 

Carpholite Image

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  Carpholite

Comments: Golden yellow compact radiating massive carpholite.
Location: Schlaggenwald, Bohemia, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Carpholite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6885:1:0.2543
Help on Cell Dimensions: Cell Dimensions: a = 13.86, b = 20.13, c = 5.12, Z = 8; V = 1,428.49 Den(Calc)= 3.06
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C cca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.73(1), 5.08(0.7), 2.62(0.5),
 

Physical Properties of Carpholite

Help on Cleavage: Cleavage: {100} Imperfect, {010} Imperfect, {110} Imperfect
Help on Color: Color: Straw yellow, Greenish gray, Yellowish brown.
Help on Density: Density: 2.9
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Silky
Help on Streak: Streak: white
 

Optical Properties of Carpholite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2035,KPDmeas= 0.2147,KC= 0.2198
Ncalc = 1.64 - 1.67
Help on Optical Data: Optical Data: Biaxial (-), a=1.61, b=1.628, g=1.63, bire=0.0200
 

Calculated Properties of Carpholite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Carpholite =2.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082060313
Boson Index = 0.9917939687
Help on Photoelectric: Photoelectric: PECarpholite = 5.33 barns/electron
U=PECarpholite x rElectron Density= 15.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Carpholite is Not Radioactive
 

Carpholite Classification

Help on  Dana Class: Dana Class: 65.01.05.01 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.01)with chains P=2
  (65.01.05)Carpholite group
 
65.01.05.01 Carpholite MnAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.01.05.02 Ferrocarpholite (Fe,Mg)Al2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.01.05.03 Magnesiocarpholite MgAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
65.01.05.04 Balipholite BaMg2LiAl3Si4O12(OH,F)8 C cca 2/m 2/m 2/m
 
65.01.05.05 Potassiccarpholite! (K,Na,[])(Li,Mn)2Al)4Si4O12(OH)4(F,OH)4 C cca 2/m 2/m 2/m
 
65.01.05.06 Vanadiocarpholite! MnVAl(Si2O6)(OH)4 C cca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DB.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DB -Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
 
09.DB.05 Carpholite MnAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
09.DB.05 Balipholite BaMg2LiAl3Si4O12(OH,F)8 C cca 2/m 2/m 2/m
 
09.DB.05 Ferrocarpholite (Fe,Mg)Al2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
09.DB.05 Magnesiocarpholite MgAl2Si2O6(OH)4 C cca 2/m 2/m 2/m
 
09.DB.05 Potassiccarpholite! (K,Na,[])(Li,Mn)2Al)4Si4O12(OH)4(F,OH)4 C cca 2/m 2/m 2/m
 
09.DB.05 Vanadiocarpholite! MnVAl(Si2O6)(OH)4 C cca 2/m 2/m 2/m
 

Other Carpholite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Carpholite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Carpholite

MnAl2Si2O6(OH)4
Dana No: 65.01.05.01 Strunz No: 09.DB.05
Locality:

 

Notes:

 

 
   
 


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