Ferrocarpholite Mineral Data
General Ferrocarpholite Information
Chemical Formula:
(Fe++,Mg)Al2Si2O6(OH)4
Composition:
Molecular Weight = 324.65 gm
Magnesium 1.50 % Mg 2.48 % MgO
Titanium 0.15 % Ti 0.25 % TiO2
Manganese 0.17 % Mn 0.22 % MnO
Aluminum 15.54 % Al 29.37 % Al2 O3
Iron 15.31 % Fe 17.93 % FeO / 1.97 % Fe2 O3
Silicon 17.56 % Si 37.57 % SiO2
Hydrogen 1.13 % H 10.10 % H2 O
Oxygen 48.64 % O
______ ______
100.00 % 99.88 % = TOTAL OXIDE
Empirical Formula:
Fe2+ 0.81 Mg0.2 Mn2+ 0.01 Al1.87 Fe3+ 0.08 Ti0.01 Si2.03 O9.87 H3.64
Environment:
In quartz veins in blueschists of low metamorphic grade, formed from felsic tuffs at about 250 �C and 3 kbar.
IMA Status:
Valid Species (Pre-IMA) 1951
Locality:
At several localities west of Tomata, Celebes, Indonesia. Link to MinDat.org Location Data.
Name Origin:
Named as the Fe-dominant member of the carpholite series.
Name Pronunciation:
Ferrocarpholite + Pronunciation
Synonym:
ICSD 34519
PDF 33-655
Ferrocarpholite Image
Images:
Ferrocarpholite Crystallography
Axial Ratios:
a:b:c =0.683:1:0.2532
Cell Dimensions:
a = 13.797, b = 20.2, c = 5.116, Z = 8; V = 1,425.83 Den(Calc)= 3.02
Crystal System:
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C cca
X Ray Diffraction:
By Intensity(I/Io ): 5.04(1), 5.69(0.7), 3.355(0.3),
Physical Properties of Ferrocarpholite
Cleavage:
{010} Perfect, {110} Indistinct
Color:
Gray green, Dark green.
Density:
3.04
Diaphaneity:
Translucent
Hardness:
5.5 - Knife Blade
Luster:
Silky
Streak:
greenish white
Optical Properties of Ferrocarpholite
Gladstone-Dale:
CI meas = 0.062 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = 0.055 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2074,KPDmeas = 0.206,KC = 0.2195 Ncalc = 1.66 - 1.67
Optical Data:
Biaxial (-), a=1.614, b=1.63, g=1.635, bire=0.0210, 2V(Calc)=56, 2V(Meas)=58.
Calculated Properties of Ferrocarpholite
Electron Density:
Bulk Density (Electron Density)=3.00 gm/cc note: Specific Gravity of Ferrocarpholite =3.02 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PEFerrocarpholite = 5.74 barns/electronU=PEFerrocarpholite x r Electron Density= 17.22 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ferrocarpholite is Not Radioactive
Ferrocarpholite Classification
Dana Class:
65.01.05.02 (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
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 Ferrocarpholite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Ferrocarpholite :
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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Ferrocarpholite
(Fe++,Mg)Al2Si2O6(OH)4
Dana No: 65.01.05.02 Strunz No: 09.DB.05
Locality:
Notes:
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