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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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First Recorded Occurrence of Vanadio-oxy-chromium-dravite

Place of Conservation of First Recorded 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 First Recorded Material:
Metaquartzite
Associated Minerals at First Recorded 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)
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
 
  • 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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