Ferrocarpholite Mineral Data

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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 % Al₂O₃

Iron 15.31 % Fe 17.93 % FeO / 1.97 % Fe₂O₃

Silicon 17.56 % Si 37.57 % SiO₂

Hydrogen 1.13 % H 10.10 % H₂O

Oxygen 48.64 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.81Mg_0.2Mn²⁺_0.01Al_1.87Fe³⁺_0.08Ti_0.01Si_2.03O_9.87H_3.64

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

Comments: Pale yellow radiating ferrocarpholite crystals.
Location: Krasno, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C cca

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.04(1), 5.69(0.7), 3.355(0.3),

Crystal Structure:

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Ferraris G , Ivaldi G , Goffe B , Neues Jahrbuch fur Mineralogie, Monatshefte , 1992 (1992) p.337-347, Structural study of a magnesian ferrocarpholite: Are carpholites monoclinic?, Locality: Mascate nappes, Ruwi, Oman

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:

PE_{Ferrocarpholite}= 5.74 barns/electron
U=PE_{Ferrocarpholite} x rElectron 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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
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: