https://www.edelsteine-neuburg.de
https://weloveminerals.com/
https://www.mineraliengrosshandel.com
https://www.mineral-bosse.de
https://www.mineralbox.biz
'._('einklappen').'
 

Vanadio-oxy-chromium-dravite

Collectors Summary

Color dunkelgrün
Streak color grün
Hardness (Mohs) 7-7,5
Crystal System trigonal, R3m

Chemism

Chemical formula

NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O

Additional chem. information

Turmalin-Supergruppe

Chemical composition

Chrom, Magnesium, Natrium, Silicium, Bor, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 1132.3635112 u; Number of atoms in the formula: 53

Info

Empirical formula:

NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.27

3

5.66

1.0079470

3.0238410
Boron

B

2.86

3

5.66

10.8117000

32.4351000
Oxygen

O

43.80

31

58.49

15.9994300

495.9823300
Sodium

Na

2.03

1

1.89

22.9897702

22.9897702
Magnesium

Mg

4.29

2

3.77

24.3050600

48.6101200
Silicon

Si

14.88

6

11.32

28.0855300

168.5131800
Vanadium

V

13.50

3

5.66

50.9415100

152.8245300
Chromium

Cr

18.37

4

7.55

51.9961600

207.9846400

Strunz 9th edition incl. updates

9.CK.05

9: Silikate (Germanate)
C: Ringsilikate (Cyclosilikate)
K: ~[Si6O18]12- sechser-Einfachringe, mit inselartig, komplexe [Anionen]
05:

Lapis Classification

VIII/E.19-032

VIII: SILIKATE
E: Ringsilikate
19: Sechserringe [Si6O18] 12-; Turmalin-Gruppe

Classification by Hölzel

9.CE.113

9: SILICATES
C: Cyclosilicates
E: Tourmaline-Group
1: Alkali-Subgroup 1 and 2 - Dravites and Elbaites

IMA status

anerkannt August 2012 - CNMNC Newsletter No. 14, October 2012, page 1282; Mineralogical Magazine, 76, 1281-1288

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Tourmaline supergroup  ⇒ Alkali-Tourmaline group  ⇒ Tourmaline Alkali-subgroup 1

Optical Properties

Color

dunkelgrün

Streak color

grün

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell parameters a (Å)

16.1260

Cell parameters b (Å)

-

Cell parameters c (Å)

7.3759

Cell parameters a/b or c/a

0.457

Cell parameters c/b

-

Z

3

Volume (ų)

1661.112

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

6.509(100), 4.293(31), 4.022(40), 3.564(53), 3.022(47), 2.611(42), 2.171(42), 2.075(40)
XRD chart Vanadio-oxy-chromium-dravite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

7-7,5

Density (g/cm³)

3.396 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Sibirien, Föderationskreis/Irkutsk (Irkutskaja), Oblast/Baikalsee/Sljudjanka (Sludyanka; Slyudyanka)/Pokhabikha-Tal/Pereval Marmorsteinbruch (Grube Kaber)

Type material

Museum der Mineralogie, Erdwissenschaften, Sapienza University von Rom, Rom, Italien

Collection number of type material

33067

Preface

Author (Name, Year)

Ferdinando Bosi, Leonid Reznitskii, Henrik Skogby und Ulf Hålenius (2012)

References

CNMNC Newsletter No. 14, October 2012, page 1282; Mineralogical Magazine, 76, 1281-1288.

Ferdinando Bosi, Leonid Reznitskii, Henrik Skogby, Ulf Hålenius: Vanadio-oxy-chromium-dravite, NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup. American Mineralogist Vol. 99 (2014) S. 1155-1162.

IMA group assignments

Other languages

German

Vanadio-Oxy-Chrom-Dravit

English

Vanadio-oxy-chromium-dravite

Alternative Name

German

Vanadio-Oxy-Chromdravit

Lapis-Mineralienverzeichnis 2018

Vanadiooxychromdravit

German

Vanadium-Oxy-Chrom-Dravit

CNMNC (IMA)-Number

IMA 2012-034

CNMNC symbol

Symbol

Vocdrv

Locations with GPS information

IDs

GUSID (Global unique identifier short form) iFqrGB1-Pkq8hfuONFTWRw
GUID (Global unique identifier) 18AB5A88-7E1D-4A3E-BC85-FB8E3454D647
Database ID 7442