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Magnesiobeltrandoite-2N3S (Magnesiobeltrandoit-2N3S)

Collectors Summary

Color schwarz, dunkel rötlichbraun wenn dünn
Hardness (Mohs) 6 - 6.5
Crystal System trigonal, P3m1

Chemism

Chemical formula

(Mg6Al2)(Al18Fe3+2)O38(OH)2

Empirical formula (analysis)

[Al18.36Mg3.96Fe2+2.52Fe3+2.08Ti0.56Cr0.40Zn0.06V3+0.03Mn0.02]Σ28O38(OH)2

Chemical composition

Aluminium, Eisen, Magnesium, Sauerstoff, Wasserstoff

Unit weight: 1544.66570325 u; Number of atoms in the formula: 69.99

Info

Empirical formula:

[Al18.36Mg3.96Fe2.52Fe2.08Ti0.56Cr0.40Zn0.06V0.03Mn0.02]O38(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.13

2

2.86

1.0079470

2.0158940

Oxygen

O

41.43

40

57.15

15.9994300

639.9772000

Magnesium

Mg

6.23

3.96

5.66

24.3050600

96.2480376

Aluminium

Al

32.07

18.36

26.23

26.9815382

495.3810414

Titanium

Ti

1.74

0.56

0.80

47.8671000

26.8055760

Vanadium

V

0.10

0.03

0.04

50.9415100

1.5282453

Chromium

Cr

1.35

0.4

0.57

51.9961600

20.7984640

Manganese

Mn

0.07

0.02

0.03

54.9380499

1.0987610

Iron

Fe

16.63

4.6

6.57

55.8452000

256.8879200

Zinc

Zn

0.25

0.06

0.09

65.4094000

3.9245640

Strunz 9th edition incl. updates

4.CB.21

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
B: Mit mittelgroßen Kationen
21:

Lapis Classification

IV/C.07-018

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)

IMA status

anerkannt - CNMNC Newsletter Novermber 2016

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Högbomite supergroup  ⇒ Beltrandoite group

Optical Properties

Color

schwarz, dunkel rötlichbraun wenn dünn

2V angle

Uniaxial (-)

Pleochroism

tiefes Rotbraun (entlang der c-Achse) und ω = rötlichbraun (⊥ c)). Absorption ist E > O

Optical Data Luminescence

Luminescence

keine Fluoreszenz unter UV-Strahlung und keine Kathodolumineszenz

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

164

Space Group

P3m1

Cell parameters a (Å)

5.7226(3)

Cell parameters b (Å)

-

Cell parameters c (Å)

23.0231(9)

Cell parameters a/b or c/a

4.023

Cell parameters c/b

-

Z

1

Volume (ų)

652.952

Crystal structure

Högbomit-Supergruppe; Struktur bestimmt

X-Ray Powder Diffraction

2.858(42),
2.735(51),
2.484(46),
2.427(100),
1.568(29),
1.514(30),
1.438(42),
1.429(72)

XRD chart Magnesiobeltrandoite-2N3S

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

Physical Properties

Hardness (Mohs)

6 - 6.5

Density (g/cm³)

3.93 (berechnet)

3.928 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Aostatal (Valle d'Aosta), Region/Valtournenche/Etirol/Marmorstrang

Type material

Museo Regionale di Scienze Naturali, Sezione di Mineralogia, Petrografia e Geologia, via Giovanni Giolitti 36, I-10123 Torino, Italien

Collection number of type material

M/U17182

Preface

Author (Name, Year)

Fernando Cámara, Roberto Cossio, Daniele Regis, Marco E. Ciriotti und Roberto Compagnoni (2016)

References

Cámara, F., Cossio, R., Regis, D.,Ciriotti, M.E. and Compagnoni, R. (2016) Magnesiobeltrandoite-2N3S, IMA 2016-073. CNMNC Newsletter No. 34, December 2016, page 1318; Mineralogical Magazine, 80, 1315–1321

Cámara, F., Cossio, R., Regis, D.,Ciriotti, M.E. and Compagnoni, R. - Beltrandoite, a new root-name in the högbomite supergroup: the Mg end-member magnesiobeltrandoite-2N3S - European Journal of Mineralogy 29(4) · October 2017

IMA group assignments



 
 
 
(Mg6Al2)(Al18Fe3+2)O38(OH)2
trigonal
P3m1

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Actuality: 26. Mar 2024 - 01:58:48

Other languages

German

Magnesiobeltrandoit-2N3S

English

Magnesiobeltrandoite-2N3S

Russian

Магнезиобелтрандоит-2N3S

CNMNC (IMA)-Number

IMA 2016-073

CNMNC symbol

Symbol

Mbt-2N3S

Locations with GPS information

IDs

GUSID (Global unique identifier short form) k_LPabAQx0qL5Zp4qFmQbA
GUID (Global unique identifier) 69CFF293-10B0-4AC7-8BE5-9A78A859906C
Database ID 8271