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Vanadio-oxy-chromium-dravite

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Formula:
Na(V)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
System:TrigonalColour:Emerald green
Hardness:
Member of:Tourmaline Group
Name:For being the V analogue of oxy-chromium-dravite.


The V analogue of oxy-chromium-dravite.

Classification of Vanadio-oxy-chromium-dravite

IMA status:Approved 2012
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Type Occurrence of Vanadio-oxy-chromium-dravite

Type Locality:Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia
Place of Conservation of Type Material:Type material has been deposited in the collections of the Museum of Mineralogy, Earth Sciences Department, Sapienza University of Rome, Rome, Italy, catalogue number 33067.
Geological Setting of type material:Metaquartzite
Associated Minerals at type locality:
QuartzTremolite

Physical Properties of Vanadio-oxy-chromium-dravite

Lustre:Vitreous
Colour:Emerald green
Streak: Pale green
Hardness (Mohs):
Fracture:Conchoidal
Density (calculated):3.3 g/cm3

Crystallography of Vanadio-oxy-chromium-dravite

Crystal System:Trigonal
Class (H-M):3m - Ditrigonal Pyramidal
Space Group:R3m
Space Group Setting:R3m
Cell Parameters:a = 16.1260(2) Å, c = 7.3759(1) Å
Ratio:a:c = 1 : 0.457
Unit Cell Volume:V 1,661.11 ų (Calculated from Unit Cell)
Z:3
X-Ray Powder Diffraction:
d-spacingIntensity
6.509 (100)
4.293 (31)
4.022 (40)
3.564 (53)
3.022 (47)
2.611 (42)
2.171 (42)
2.075 (40)

Optical Data of Vanadio-oxy-chromium-dravite

Type:Uniaxial (-)
RI values: nω = 1.767() nε = 1.710(5)
Maximum Birefringence:δ = 0.057

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Pleochroism:Visible
Comments:In plane-polarized light:O = dark green, E = pale green

Chemical Properties of Vanadio-oxy-chromium-dravite

Formula:
Na(V)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Simplified for copy/paste:Na(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Essential elements:B, Cr, H, Mg, Na, O, Si, V
All elements listed in formula:B, Cr, H, Mg, Na, O, Si, V

Relationship of Vanadio-oxy-chromium-dravite to other Species

Member of:Tourmaline Group
Other Members of Group:

- +
Adachiite
Chromium-dravite
Na(Mg
 
3
)Cr
3+
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Chromo-alumino-povondraite
Na(Cr
 
3
)(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Darrellhenryite
Na(LiAl
 
2
)Al
 
6
(BO
 
3
)
 
3
Si
 
6
O
 
18
(OH)
 
3
O
Dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Fluor-buergerite
Na(Fe
3+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
F
Fluor-dravite
Na(Mg
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-elbaite
Na(Li
 
1.5
Al
 
1.5
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-feruvite
Ca(Fe
2+
 
)
 
3
MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Fluor-uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
F
Foitite
(□,Na)(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
OH
Liddicoatite
Ca(Li
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Luinaite-(OH)
Na(Fe
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Magnesiofoitite
(□,Na)(Mg
 
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Maruyamaite
K(MgAl
 
2
)(Al
 
5
Mg)(BO
 
3
)
 
3
(Si
 
6
O
 
18
)(OH)
 
3
O
Olenite
Na(Al
 
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
O
 
3
(OH)
Oxy-chromium-dravite
Na(Cr)
 
3
(Cr
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-dravite
Na(MgAl
 
2
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-schorl
Na(Fe
2+
2
Al)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Oxy-vanadium-dravite
Na(V)
 
3
(V
 
4
Mg
 
2
)Si
 
6
O
 
18
(BO
 
3
)
 
3
(OH)
 
3
O
Povondraite
NaFe
3+
3
(Mg
 
2
Fe
3+
4
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O
Rossmanite
☐(LiAl
 
2
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Schorl
Na(Fe
2+
3
)Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
Tsilaisite
Na(Mn
2+
 
)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(OH)
UM2000-64-SiO:BFeHKMg
K, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)
(Pb,Na)(Li,Al)
 
3
Al
 
6
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F,OH)
Uvite
Ca(Mg
 
3
)MgAl
 
5
(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
(F/OH)
Vanadio-oxy-dravite
NaV
 
3
(Al
 
4
Mg
 
2
)(Si
 
6
O
 
18
)(BO
 
3
)
 
3
(OH)
 
3
O

Other Names for Vanadio-oxy-chromium-dravite

Synonyms:
IMA2012-034
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Vanadio-oxy-chromium-dravite

Reference List:

- +
Bosi, F., Reznitskii, L., Skogby, H. and Hålenius, U. (2012) Vanadio-oxy-chromium-dravite, IMA 2012-034. CNMNC Newsletter No. 14, October 2012, page 1286; Mineralogical Magazine, 76, 1281-1288.

Bosi, F., Reznitski, L., Skogby, H., Hålenius, U. (2014): Vanadio-oxy-chromium-dravite, NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup. American Mineralogist, 99, 1155-1162.

Vereshchagin, O. S., Rozhdestvenskaya, I. V., Frank-Kamenetskaya, O. V., Zolotarev, A. A. (2014): Ion substitutions and structural adjustment in Cr-bearing tourmalines. European Journal of Mineralogy 26, 309-321.

Best Localities for Vanadio-oxy-chromium-dravite

Best of Species:Vanadio-oxy-chromium-dravite

Internet Links for Vanadio-oxy-chromium-dravite

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  • Localities for Vanadio-oxy-chromium-dravite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lake Baikal area
            • Slyudyanka (Sludyanka)
    Bosi, F., Reznitskii, L., Skogby, H. and Hålenius, U. (2012) Vanadio-oxy-chromium-dravite, IMA 2012-034. CNMNC Newsletter No. 14, October 2012, page 1286; Mineralogical Magazine, 76, 1281-1288.
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