Vanadiocarpholite Mineral Data

General Vanadiocarpholite Information

Chemical Formula:

Mn++V+++Al(Si2O6)(OH)4

Composition:

Molecular Weight = 353.06 gm

Manganese 15.56 % Mn 20.09 % MnO

Aluminum 7.64 % Al 14.44 % Al₂O₃

Vanadium 14.43 % V 21.23 % V₂O₃

Silicon 15.91 % Si 34.04 % SiO₂

Hydrogen 1.14 % H 10.21 % H₂O

Oxygen 45.32 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺V³⁺AlSi₂O₆(OH)₄

Environment:

Found in open fissures in a silicified wood sample from Mn-ore bearing cherts. Carpholite group

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Molinello Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy. Link to MinDat.org Location Data.

Name Origin:

Named as the V-dominant analogue of carpholite.

Synonym:

IMA2003-055

Vanadiocarpholite Image

Images:

Vanadiocarpholite

Comments: Micro-fibrous tan crystals of vanadiocarpholite to 0.75mm.
Location: Molinello Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Vanadiocarpholite Crystallography

Axial Ratios:

a:b:c =0.6687:1:0.2508

Cell Dimensions:

a = 13.83, b = 20.681, c = 5.188, Z = 8; V = 1,483.86 Den(Calc)= 3.16

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/I_o): 5.75(1), 2.641(0.26), 3.08(0.22),5.15(0.18), 3.46(0.15), 4.72(0.14),

Physical Properties of Vanadiocarpholite

Cleavage:

{010} Perfect

Color:

Pale straw yellow, Brown.

Diaphaneity:

Transparent

Fracture:

Flexible - Flexible fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Luster:

Vitreous - Silky

Optical Properties of Vanadiocarpholite

Gladstone-Dale:

CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2189,KC= 0.2342
Ncalc = 1.74

Optical Data:

Biaxial (+), a=1.684, b=1.691, g=1.7, bire=0.0160

Calculated Properties of Vanadiocarpholite

Electron Density:

Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Vanadiocarpholite =3.16 gm/cc.

Fermion Index:

Fermion Index = 0.0080098526
Boson Index = 0.9919901474

Photoelectric:

PE_{Vanadiocarpholite}= 7.49 barns/electron
U=PE_{Vanadiocarpholite} x rElectron Density= 23.19 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vanadiocarpholite is Not Radioactive

Vanadiocarpholite Classification

Dana Class:

65.01.05.06 (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 Vanadiocarpholite Information

References:

NAME( EurJMin v17:501) PHYS. PROP.(EurJMin v17:501)

See Also:

Links to other databases for Vanadiocarpholite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Vanadiocarpholite

Mn++V+++Al(Si2O6)(OH)4
Dana No: 65.01.05.06 Strunz No: 09.DB.05
Locality:

Notes:

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