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Vanadoandrosite-(Ce)

Additional Functions

Collectors Summary

Color dunkelbraun bis schwarz
Streak color braun
Crystal System monoklin, P21/m

Chemism

Chemical formula

(Mn2+,Ca)(REE)V3+AlMn2+(Si2O7)(SiO4)O(OH)

Additional chem. information

mit Ce als dominantes REE; Epidot Gruppe

Chemical composition

Aluminium, Calcium, Mangan, Silicium, Sauerstoff, Vanadium, Wasserstoff, REE

Unit weight: 621.341362525 u; Number of atoms in the formula: 22

Info

Empirical formula:

(Mn0.75Ca0.25)(REE)VAlMn(Si2O7)(SiO4)O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.16

1

4.55

1.0079470

1.0079470

Oxygen

O

33.47

13

59.09

15.9994300

207.9925900

Aluminium

Al

4.34

1

4.55

26.9815382

26.9815382

Silicon

Si

13.56

3

13.64

28.0855300

84.2565900

Calcium

Ca

1.61

0.25

1.14

40.0784000

10.0196000

Vanadium

V

8.20

1

4.55

50.9415100

50.9415100

Manganese

Mn

15.47

1.75

7.95

54.9380499

96.1415873

Rare Earth

REE

23.18

1

4.55

144.0000000

144.0000000

Strunz 9th edition incl. updates

9.BG.05

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
05:Epidot-Gruppe

Lapis Classification

VIII/C.23-075

VIII: SILIKATE
C: Gruppensilikate
23: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen; Epidot-Gruppe

Classification by Hölzel

9.BN.270

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
2: Allanite-Group

Dana 8th edition

58.02.01a.22

58: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
02: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n=1,2)
01a: Epidote group (Clinozoisite subgroup)

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote supergroup  ⇒ Allanite group

Optical Properties

Color

dunkelbraun bis schwarz

Streak color

braun

RI value β

1.82

Ri mean

1.820

2V angle

Biaxial

Pleochroism

starker Pleochroismus; gelbbraun < rotbraun < dunk

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.856

Cell parameters b (Å)

5.729

Cell parameters c (Å)

10.038

Cell parameters a/b or c/a

1.546

Cell parameters c/b

1.752

Cell parameters α

90°

Cell parameters β

113.09°

Cell parameters γ

90°

Z

2

Volumne (ų)

468.489

X-Ray Powder Diffraction

9.23(20),
3.5(40),
2.889(100),
2.864(40),
2.711(30),
2.702(30),
2.612(50),
2.592(30)

XRD chart Vanadoandrosite-(Ce)

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.27 (berechnet)

4.404 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Cenki-Tok & Ragu & Armbruster & Chopin & Medenbach, 2006

References

European Journal of Mineralogy 18 (2006), 569

IMA group assignments

Other languages

German

Vanadoandrosit-(Ce)

English

Vanadoandrosite-(Ce)

Traditional Chinese

鈰釩錳綠泥石

Simplified Chinese

铈钒锰绿泥石

CNMNC (IMA)-Number

IMA 2004-015

CNMNC symbol

Symbol

Vda-Ce