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Cavoite (Cavoit)

Collectors Summary

Color farblos, grünlichbraun
Streak color weiß
Cleavages keine
Crystal System orthorhombisch, Pnam

Chemism

Chemical formula

Ca[V34+O7]

Chemical composition

Calcium, Sauerstoff, Vanadium

Unit weight: 304.89894 u; Number of atoms in the formula: 11

Info

Empirical formula:

Ca[V3O7]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

36.73

7

63.64

15.9994300

111.9960100

Calcium

Ca

13.14

1

9.09

40.0784000

40.0784000

Vanadium

V

50.12

3

27.27

50.9415100

152.8245300

Analysis wt%

VO2 : 76.80, SiO2 : 4.31, MnO : 0.70, CaO : 17.76 (Ref: European Journal of Mineralogy 2003)

Strunz 9th edition incl. updates

4.HE.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
H: V[5,6] Vanadate
E: Schichtvanadate (Phyllovanadate)
40:Cavoit-Gruppe

Lapis Classification

IV/G.09-020

IV: OXIDE
G: Vanadiumoxide (Polyvanadate mit V4+/5+)
9: Schichtvanadate, als typische Vanadiumbronzen

Classification by Hölzel

4.GA.370

4: OXIDES
G: Vanadin, Uranyl Oxides and Hydroxides
A: Vanadin Oxides and Hydroxides, VBronzes
3: Mean Valency for V: 4 without Cations

Dana 8th edition

47.02.05.01

47: Vanadium Oxysalts
02: Vanadium Oxysalts (VmOn)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, grünlichbraun

Streak color

weiß

RI value α / ω / n

2.0

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnam

Cell parameters a (Å)

10.42

Cell parameters b (Å)

5.28

Cell parameters c (Å)

10.34

Cell parameters a/b or c/a

1.973

Cell parameters c/b

1.958

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

568.882

X-Ray Powder Diffraction

5.16(50),
3.45(30),
3.00(100),
2.88(30),
2.63(20),
2.07(20),
1.85(50),
1.56(20)

XRD chart Cavoite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.51 (berechnet)

3.56 ( ρ calc. Mineralienatlas )

Cleavages

keine

Tenacity

spröde

Preface

Author (Name, Year)

Basso & Luchetti & Martinelli & Palenzona, 2003

References

European Journal of Mineralogy 15 (2003), 181

Other languages

German

Cavoit

Spanish

Cavoita

English

Cavoite

French

Cavoite

Russian

Кавоит

CNMNC (IMA)-Number

IMA 2001-024

CNMNC symbol

Symbol

Cvo

Locations with GPS information

IDs

GUSID (Global unique identifier short form) d0jlvQVvyk2iR64QSpNM0Q
GUID (Global unique identifier) BDE54877-6F05-4DCA-A247-AE104A934CD1
Database ID 636