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Stavelotite-(La)

Additional Functions

Collectors Summary

Color schwarz
Streak color dunkel rötlichbraun
Lustre Metallglanz
Cleavages keine
Fracture keiner
Crystal System trigonal, P31

Chemism

Chemical formula

La3Mn2+3Cu2+(Mn3+,Fe3+,Mn4+)26(Si2O7)6O30

Chemical composition

Eisen, Kupfer, Lanthanum, Mangan, Silicium, Sauerstoff

Unit weight: 3569.52739788 u; Number of atoms in the formula: 117

Info

Empirical formula:

La3Mn3Cu(Mn0.6Fe0.3Mn0.1)26(Si2O7)6O30

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

32.27

72

61.54

15.9994300

1,151.9589600
Silicon

Si

9.44

12

10.26

28.0855300

337.0263600
Manganese

Mn

32.63

21.2

18.12

54.9380499

1,164.6866579
Iron

Fe

12.20

7.8

6.67

55.8452000

435.5925600
Copper

Cu

1.78

1

0.85

63.5463000

63.5463000
Lanthanum

La

11.67

3

2.56

138.9055200

416.7165600

Analysis wt%

Ø SiO2 : 20.17, TiO2 : 0.44, MnO2 : 4.84, Al2O3 : 3.30, Fe2O3 : 13.08, Mn2O3 : 31.67, Sc2O3 : 1.47, MgO : 1.06, CuO : 2.11, MnO : 5.99, La2O3 : 8.39, Nd2O3 : 3.39, Ce2O3 : 0.44, Ln2O3 : 12.22 (Ref: European Journal of Mineralogy 2005)

Strunz 9th edition incl. updates

9.BE.87

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
87:

Lapis Classification

VIII/C.17-040

VIII: SILIKATE
C: Gruppensilikate
17: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F); Chevkinit-Reihe

Classification by Hölzel

9.BK.300

9: SILICATES
B: Sorosilicates
K: Perrierite-Group

Dana 8th edition

07.10.04.01

07: Multiple Oxides
10: Multiple Oxides

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

dunkel rötlichbraun

Lustre

Metallglanz

RI value α / ω / n

2.14

Ri mean

2.14

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

144

Space Group

P31

Cell parameters a (Å)

11.525

Cell parameters b (Å)

-

Cell parameters c (Å)

33.347

Cell parameters a/b or c/a

2.893

Cell parameters c/b

-

Z

3

Volume (ų)

3835.918

X-Ray Powder Diffraction

11.116(18) 5.446(31), 3.1873(19), 2.7789(40), 2.7232(100), 2.3702(29), 1.6887(28), 1.6635(40)
XRD chart Stavelotite-(La)

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.49 (berechnet)

4.635 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

keiner

(Co-)Type locality

(Co-)Type locality

Belgien/Wallonie/Luxemburg (Luxembourg), Provinz/Bastogne, Bezirk/Vielsalm/Salmchâteau/Le Coreux Mine

Preface

Name from

Typlokalität

Author (Name, Year)

Bernhardt & Armbruster & Fransolet & Schreyer, 2005

References

E.-J. Bernhardt, T. Armbruster, A.-M. Fransolet & W. Schreyer: "Stavelotite-(La), a new lanthanum-manganese-sorosilicate mineral from the Stavelot Massif, Belgium", European Journal of Mineralogy 17(5):703–714 (2005)

Other languages

German

Stavelotit-(La)

English

Stavelotite-(La)

Traditional Chinese

矽高低錳銅鑭礦

Simplified Chinese

硅高低锰铜镧矿

CNMNC (IMA)-Number

IMA 2004-014

CNMNC symbol

Symbol

Svt-La

IDs

GUSID (Global unique identifier short form) h92ECLQGW060waS5bcDwCg
GUID (Global unique identifier) 0884DD87-06B4-4E5B-B4C1-A4B96DC0F00A
Database ID 3613