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Vanadiumdravite Mineral Data

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General Vanadiumdravite Information

Help on Chemical  Formula: Chemical Formula: NaMg3V6(Si6O18)(BO3)3(OH)4
Help on Composition: Composition: Molecular Weight = 1,109.10 gm
   Potassium   0.35 %  K     0.42 % K2O
   Sodium      1.87 %  Na    2.51 % Na2O
   Magnesium   5.04 %  Mg    8.36 % MgO
   Aluminum    1.46 %  Al    2.76 % Al2O3
   Vanadium   26.64 %  V    39.19 % V2O3
   Chromium    2.34 %  Cr    3.07 % CrO
   Silicon    15.19 %  Si   32.50 % SiO2
   Boron       2.92 %  B     9.42 % B2O3
   Hydrogen    0.30 %  H     2.68 % H2O
   Oxygen     43.71 %  O
   Fluorine    0.17 %  F     0.17 % F
                -   %   F    -0.07 % -O=F2    
             ______        ______ 
             100.00 %      101.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.9K0.1Mg2.3Al0.6Cr0.5V3+5.8(Si6O18)(BO3)3(F)0.1(OH)3.3
Help on Environment: Environment: Accessory mineral in metamorphic rocks with quartz and Cr-V bearing diopside. Tourmaline group.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Slyudyanka complex, Lake Baikal region, Zabaikalye (Transbaikal), Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its vanadium content and the mineral dravite.
Help on Synonym: Synonym: IMA1999-050

Vanadiumdravite Image

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Comments: Crude basal crystal section of vanadiumdravite in quartz matrix.
Location: Srednyaya Padma U-V deposit, Zaonezhie peninsula, Lake Onega, Karelia Republic, Northern Region, Russia. Scale: Picture Size 2.5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Vanadiumdravite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.45843
Help on Cell Dimensions: Cell Dimensions: a = 16.12, c = 7.39, Z = 3; V = 1,663.05 Den(Calc)= 3.32
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.62(1)(051), 2.07(0.9)(152), 3.04(0.9)(410),6.54(0.9)(101), 4.04(0.8)(220), 3.57(0.7)(012), 1.951(0.5)(342),

Physical Properties of Vanadiumdravite

Help on Cleavage: Cleavage: {101} Imperfect, {110} Imperfect
Help on Color: Color: Dark green, Black.
Help on Density: Density: 3.32
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Resinous
Help on Streak: Streak: yellowish brownish green

Optical Properties of Vanadiumdravite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2282,KPDmeas= 0.2282,KC= 0.2406
Ncalc = 1.8
Help on Optical Data: Optical Data: Uniaxial (-), e=1.729, w=1.786, bire=0.0570.

Calculated Properties of Vanadiumdravite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Vanadiumdravite =3.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEVanadiumdravite = 6.39 barns/electron
U=PEVanadiumdravite x relectron= 20.58 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4.95 (Gamma Ray American Petroleum Institute Units)
Concentration of Vanadiumdravite per GRapi unit = 20.22 (%)

Estimated Radioactivity from Vanadiumdravite - barely detectable


Vanadiumdravite Classification

Help on  Dana Class: Dana Class: 61.03e.01.12 (61)Cyclosilicate Six-Membered Rings
  (61.03e)with borate groups (Sodic Tourmaline Subgroup)
  (61.03e.01)Schorl Subgroup
61.03e.01.09 Dravite! NaMg3Al6(BO3)3Si6O18(OH)4 R 3m 3m
61.03e.01.10 Schorl! NaFe3Al6(BO3)3Si6O18(OH)4 R 3m 3m
61.03e.01.10a Schorl-(F)! NaFe3Al6Si6O18)(BO3)3(OH)3(F,OH) R 3m 3m
61.03e.01.11 Chromdravite! NaMg3(Cr,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
61.03e.01.12 Vanadiumdravite! NaMg3V6(Si6O18)(BO3)3(OH)4 R 3m 3m
Help on  Strunz Class: Strunz Class: 09.CK.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CK -[Si6O18]12- 6-membered single rings, with insular complex anions
09.CK.05 Chromdravite! NaMg3(Cr,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Feruvite! (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Dravite NaMg3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Buergerite! NaFe3Al6(BO3)3Si6O21F R 3m 3m
09.CK.05 Foitite! []Na<0.5(Fe,Al)3Al6Si6O18(BO3)3(OH)4 R 3m 3m
09.CK.05 Liddicoatite! Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 R 3m 3m
09.CK.05 Elbaite Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Rossmanite! []LiAl2Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Olenite! NaAl3Al6(BO3)3(Si6O18)(O,OH)4 R 3m 3m
09.CK.05 Povondraite! (Na,K)(Fe,Fe)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Schorl NaFe3Al6(BO3)3Si6O18(OH)4 R 3m 3m
09.CK.05 Uvite (Ca,Na)(Mg,Fe)3Al5Mg(BO3)3Si6O18(OH,F)4 R 3m 3m
09.CK.05 Vanadiumdravite! NaMg3V6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Magnesiofoitite! [](Mg2Al)Al6(Si6O18)(BO3)3(OH)4 R 3m 3m
09.CK.05 Hydroxyuvite! CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) R 3m 3m
09.CK.05 Schorl-(F)! NaFe3Al6Si6O18)(BO3)3(OH)3(F,OH) R 3m 3m

Other Vanadiumdravite Information

Help on References: References: NAME( AmMin, Vol 87, p 1512) PHYS. PROP.(AmMin, Vol 87, p 1512) OPTIC PROP.(AmMin, Vol 87, p 1512)
Help on See Also: See Also: Links to other databases for Vanadiumdravite :
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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Dana No: 61.03e.01.12 Strunz No: 09.CK.05





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