Ardennite-(V) Mineral Data

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General Ardennite-(V) Information

Chemical Formula:

Mn++4[Al4(Mg,Al,Fe+++,Mn+++)2][Si5(V,Si)]O22(OH)6

Composition:

Molecular Weight = 1,015.46 gm

Sodium 0.01 % Na 0.02 % Na₂O

Calcium 3.05 % Ca 4.27 % CaO

Magnesium 2.70 % Mg 4.47 % MgO

Titanium 0.13 % Ti 0.21 % TiO₂

Manganese 18.17 % Mn 22.49 % MnO / 1.01 % Mn₂O₃

Aluminum 12.05 % Al 22.77 % Al₂O₃

Vanadium 2.60 % V 4.64 % V₂O₅

Chromium 0.24 % Cr 0.34 % Cr₂O₃

Iron 1.15 % Fe 1.65 % Fe₂O₃

Silicon 14.70 % Si 31.45 % SiO₂

Arsenic 0.24 % As 0.37 % As₂O₅

Phosphorus 0.17 % P 0.38 % P₂O₅

Hydrogen 0.64 % H 5.74 % H₂O

Oxygen 43.97 % O

Fluorine 0.17 % F 0.17 % F

- % F -0.07 % -O=F₂

______ ______

100.00 % 99.94 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_3.22Ca_0.77Na_0.006Al_4.45Mg_1.12Fe³⁺_0.21Mn³⁺_0.13Cr_0.04Ti_0.02Si₅V⁵⁺_0.51Si_0.31 Al_0.08P_0.05As_0.03O_21.43(OH)_6.47F_0.09

Environment:

Found in a specimen of piemontite-bearing mica schist. Forms a series with ardennite-(As).

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Sparone, Val di Locana, Piedmont, Italy. Link to MinDat.org Location Data.

Name Origin:

Named as the vanadium analogue of ardennite (ardennite-(As).

Name Pronunciation:

Ardennite-(V) + Pronunciation

Synonym:

IMA2005-037

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Ardennite-(V) Crystallography

Axial Ratios:

a:b:c =1.5005:1:3.1791

Cell Dimensions:

a = 8.76, b = 5.838, c = 18.56, Z = 2; V = 949.17 Den(Calc)= 3.55

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnmm

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

By Intensity(I/I_o): 2.609(1), 2.948(0.9), 1.585(0.75),2.033(0.55), 1.477(0.45), 1.525(0.39), 2.329(0.38), 2.271(0.37),

Physical Properties of Ardennite-(V)

Cleavage:

None

Color:

Yellow.

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ardennite-(V)

Optical Data:

NCalc= 1.79 - from Gladstone-Dale relationship (KC = 0.2216) where Ncalc=Dcalc*KC+1

Calculated Properties of Ardennite-(V)

Electron Density:

Bulk Density (Electron Density)=3.48 gm/cc
note: Specific Gravity of Ardennite-(V) =3.55 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ardennite-(V)}= 7.03 barns/electron
U=PE_{Ardennite-(V)} x rElectron Density= 24.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ardennite-(V) is Not Radioactive

Ardennite-(V) Classification

Dana Class:

58.03.01.03 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.03)with insular single and triple groups (n=1,3)

(58.03.01)Ardennite group

58.03.01.01 Ardennite-(As) (Mn,Ca,Mg)4(Al,Mg,Fe)6(SiO4)2(Si3O10)(AsO4,VO4)(OH)6 Pnmm 2/m 2/m 2/m

58.03.01.02 Orientite Ca2MnMn2Si3O10(OH)4 C mcm 2/m 2/m 2/m

58.03.01.03 Ardennite-(V)! Mn4[Al4(Mg,Al,Fe,Mn)2][Si5(V,Si)]O22(OH)6 Pnmm 2/m 2/m 2/m

Strunz Class:

09.BJ.40 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BJ -Sorosilicates with Si3O10, Si4O11, etc

09.BJ.40 Ardennite-(As) (Mn,Ca,Mg)4(Al,Mg,Fe)6(SiO4)2(Si3O10)(AsO4,VO4)(OH)6 Pnmm 2/m 2/m 2/m

09.BJ.40 Ardennite-(V)! Mn4[Al4(Mg,Al,Fe,Mn)2][Si5(V,Si)]O22(OH)6 Pnmm 2/m 2/m 2/m

Other Ardennite-(V) Information

References:

NAME( AmMin, v93:702) PHYS. PROP.(AmMin, v93:702) OPTIC PROP.(AmMin, v93:702)

See Also:

Links to other databases for Ardennite-(V) :
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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Print or Cut-and-Paste your Ardennite-(V) Specimen Label here :

Ardennite-(V)

Mn++4[Al4(Mg,Al,Fe+++,Mn+++)2][Si5(V,Si)]O22(OH)6
Dana No: 58.03.01.03 Strunz No: 09.BJ.40
Locality:

Notes: