Vanadiumdravite Mineral Data

General Vanadiumdravite Information

Chemical Formula:

NaMg3V6(Si6O18)(BO3)3(OH)4

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

Empirical Formula:

Na_0.9K_0.1Mg_2.3Al_0.6Cr_0.5V³⁺_5.8(Si₆O₁₈)(BO₃)₃(F)_0.1(OH)_3.3

Environment:

Accessory mineral in metamorphic rocks with quartz and Cr-V bearing diopside. Tourmaline group.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Slyudyanka complex, Lake Baikal region, Zabaikalye (Transbaikal), Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its vanadium content and the mineral dravite.

Synonym:

IMA1999-050

Tourmaline

Vanadiumdravite Image

Images:

Vanadiumdravite

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

Axial Ratios:

a:c = 1:0.45843

Cell Dimensions:

a = 16.12, c = 7.39, Z = 3; V = 1,663.05 Den(Calc)= 3.32

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m

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

By Intensity(I/I_o): 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

Cleavage:

{101} Imperfect, {110} Imperfect

Color:

Dark green, Black.

Density:

3.32

Diaphaneity:

Translucent to opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

7.5 - Garnet

Luster:

Resinous

Streak:

yellowish brownish green

Optical Properties of Vanadiumdravite

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

Optical Data:

Uniaxial (-), e=1.729, w=1.786, bire=0.0570.

Calculated Properties of Vanadiumdravite

Electron Density:

Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Vanadiumdravite =3.32 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Vanadiumdravite}= 6.39 barns/electron
U=PE_{Vanadiumdravite} x r_electron= 20.58 barns/cc.

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

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

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

References:

NAME( AmMin, Vol 87, p 1512) PHYS. PROP.(AmMin, Vol 87, p 1512) OPTIC PROP.(AmMin, Vol 87, p 1512)

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

Search for Vanadiumdravite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Vanadiumdravite :

A Bijoux Google Search for Vanadiumdravite
Adam's Minerals Google Search for Vanadiumdravite
Cape Minerals Google Search for Vanadiumdravite
Dakota Matrix Minerals Google Search for Vanadiumdravite
Excalibur Mineral Corp. Google Search for Vanadiumdravite
Exceptional Minerals Google Search for Vanadiumdravite
John Betts Fine Minerals Search for Vanadiumdravite
McDougall Minerals Google Search for Vanadiumdravite
Mineral News Website Link
Rock and Mineral Shows Google Search for Vanadiumdravite
Weinrich Minerals, Inc. Google Search for Vanadiumdravite

Ask about Vanadiumdravite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Vanadiumdravite Specimen Label here :

Vanadiumdravite

NaMg3V6(Si6O18)(BO3)3(OH)4
Dana No: 61.03e.01.12 Strunz No: 09.CK.05
Locality:

Notes: