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Vanadio-oxy-chromium-dravite

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Formula:
Na(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
System:
Trigonal
Colour:
Emerald green
Hardness:
Name:
For being the V analogue of oxy-chromium-dravite.
The V analogue of oxy-chromium-dravite.

Classification of Vanadio-oxy-chromium-dravite

Approved 2012
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Type Occurrence of Vanadio-oxy-chromium-dravite

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:

Physical Properties of Vanadio-oxy-chromium-dravite

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

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 Data:
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)
Max Birefringence:
δ = 0.057
Image 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(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Essential elements:
All elements listed in formula:

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

Other Members of Group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)
BosiiteNaFe33+(Al4Mg2)(Si6O18)(BO3)3(OH)3O
Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3O
DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O
DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)
Fluor-buergeriteNa(Fe33+)Al6(Si6O18)(BO3)3O3F
Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Fluor-feruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
Fluor-schorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3F
Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3F
Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3F
Foitite(□,Na)(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3OH
LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)
Magnesio-foitite(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
MaruyamaiteK(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3O
OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)
Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3O
Oxy-rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O
Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3O
PovondraiteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)
SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)
UM2000-64-SiO:BFeHKMgK, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)(Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH)
UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O

Other Names for Vanadio-oxy-chromium-dravite

Name in Other Languages:

Other Information

Health Risks:
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.

Internet Links for Vanadio-oxy-chromium-dravite

Localities for Vanadio-oxy-chromium-dravite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • 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.
Mineral and/or Locality  
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