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Montebrasite

Pictures (13 Images total)

Montebrasit
Views (File:
1579449901
): 684
Montebrasit
Größe: 81x61x50 mm; Fundort: Fazenda Pomaroli, Linopolis, Governador Valadares, Minas Gerais, Braslilien
Copyright: Jewels-Fine-Minerals; Contribution: Philip Blümner
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)/Fazenda Pomarolli (Pomarolli Farm; João Firmino claim)
Mineral: Montebrasite
Image: 1579449901
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Montebrasit

Größe: 81x61x50 mm; Fundort: Fazenda Pomaroli, Linopolis, Governador Valadares, Minas Gerais, Braslilien
Copyright: Jewels-Fine-Minerals
Contribution: Philip Blümner 2020-01-19
Locality: Fazenda Pomarolli (Pomarolli Farm; João Firmino claim) / Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Montebrasit
Views (File:
1186827895
): 1952
Montebrasit
Montebrasit-Zwilling mit Kosnarit und Albit; Größe: 15,2 x 10,2 x 10,7 cm; Fundort: Jenipapo District, Itinga, Minas Gerais, Brasilien
Copyright: Joe Freilich; Contribution: Hg
Collection: Joe Freilich
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Jequitinhonha, Fluss/Itinga/Jenipapo District
Mineral: Montebrasite
Image: 1186827895
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Montebrasit

Montebrasit-Zwilling mit Kosnarit und Albit; Größe: 15,2 x 10,2 x 10,7 cm; Fundort: Jenipapo District, Itinga, Minas Gerais, Brasilien

Collection: Joe Freilich
Copyright: Joe Freilich
Contribution: Hg 2007-08-11
Locality: Jenipapo District / Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Montebrasit
Views (File:
1225550984
): 2062
Montebrasit
Fo.: Telirio Mine, Linopolis, Governador Valadares Minas Gerais, Brasilien, dicktafeliger, blaß gelber Kristall, BB 24,0mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A012635, Donator: Manfred Seitz
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)
Mineral: Montebrasite
Image: 1225550984
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Montebrasit (SNr: A012635)

Fo.: Telirio Mine, Linopolis, Governador Valadares Minas Gerais, Brasilien, dicktafeliger, blaß gelber Kristall, BB 24,0mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2008-11-01
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Montebrasit
Views (File:
1303940417
): 820
Montebrasit
Größe: 9,8 x 6,2 x 5,3 cm, Fundort: Jenipapo-Distrikt, Itinga, Minas Gerais, Südöstliche Region, Brasilien
Copyright: Rob Lavinsky; Contribution: thdun5
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Jequitinhonha, Fluss/Itinga/Jenipapo District
Mineral: Montebrasite
Image: 1303940417
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Montebrasit

Größe: 9,8 x 6,2 x 5,3 cm, Fundort: Jenipapo-Distrikt, Itinga, Minas Gerais, Südöstliche Region, Brasilien
Copyright: Rob Lavinsky
Contribution: thdun5 2011-04-27
Locality: Jenipapo District / Itinga / Jequitinhonha, Fluss / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Montebrasit
Views (File:
1303941291
): 805
Montebrasit
Größe: 4,3 x 3,6 x 3,1 cm, Fundort: Telirio Mine, Linópolis, Galiléia, Doce-Tal, Minas Gerais, Südöstliche Region, Brasilien
Copyright: Dan Weinrich; Contribution: thdun5
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)/Telirio Mine
Mineral: Montebrasite
Image: 1303941291
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Montebrasit

Größe: 4,3 x 3,6 x 3,1 cm, Fundort: Telirio Mine, Linópolis, Galiléia, Doce-Tal, Minas Gerais, Südöstliche Region, Brasilien
Copyright: Dan Weinrich
Contribution: thdun5 2011-04-27
Locality: Telirio Mine / Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color bläulich, farblos, grünlich, grünlich grau, grauweiß
Streak color weiß
Hardness (Mohs) 5.75
Solubility +++ HF, ++ H2SO4, + andere Säuren, +- heißes H2O
Crystal System triklin, C1

Chemism

Chemical formula

LiAl(PO4)(OH,F)

Chemical composition

Aluminium, Lithium, Fluor, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 146.3993529625 u; Number of atoms in the formula: 8.75

Info

Empirical formula:

LiAl(PO4)((OH)0.75F0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.52

0.75

8.57

1.0079470

0.7559603
Lithium

Li

4.74

1

11.43

6.9412000

6.9412000
Oxygen

O

51.91

4.75

54.29

15.9994300

75.9972925
Fluorine

F

3.24

0.25

2.86

18.9984033

4.7496008
Aluminium

Al

18.43

1

11.43

26.9815382

26.9815382
Phosphorus

P

21.16

1

11.43

30.9737612

30.9737612

Analysis wt%

Al2O3 : 35.10, Li2O : 9.52, P2O5 : 49.11, H2O : 5.32, F : 1.40 (Ref: American Mineralogist 73)

Strunz 9th edition incl. updates

8.BB.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
B: Mit ausschließlich mittelgroßen [Kationen], (OH, etc.): RO4 ≤ 1:1
05:Amblygonit-Gruppe

Lapis Classification

VII/B.02-040

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
2: Mittelgroße Kationen: Mg-Mn-Fe-Cu-Zn; Amblygonit-Gruppe

Classification by Hölzel

8.BA.510

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
A: Phosphates, C Be,Li
5: Li-Phosphates, C medium Amblygonite-Group

Dana 8th edition

41.05.08.02

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
05: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A B)2 (XO4) Zq
08: Amblygonite Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

bläulich, farblos, grünlich, grünlich grau, grauweiß

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.03
Birefringence chart\! Montebrasite title=Birefringence chart Montebrasite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.59

RI value β

1.61

RI value γ / ε

1.62

Ri mean

1.607

2V angle

Biaxial (-) 82°

Optical Data Luminescence

Color LW-UV (365nm)

  

blau

LW-UV Other Colors

  

grün

Most Common Activator

Unknown

Other Activators

(UO2)2+ (Uranyl-Ion) als Verunreinigungen

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

C1

Cell parameters a (Å)

5.19

Cell parameters b (Å)

7.12

Cell parameters c (Å)

5.04

Cell parameters a/b or c/a

0.729

Cell parameters c/b

0.708

Cell parameters α

112.5

Cell parameters β

97.83

Cell parameters γ

68.13

Z

2

Volume (ų)

159.678

X-Ray Powder Diffraction

4.659(90),
3.329(70),
3.273(50),
3.211(90),
3.159(100),
2.967(90),
2.496(70),
2.397(80)
XRD chart Montebrasite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.75

VHN (Hardness Vickers)

630 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.027

3.045 ( ρ calc. Mineralienatlas )

Instability

+++ HF, ++ H2SO4, + andere Säuren, +- heißes H2O

(Co-)Type locality

(Co-)Type locality

Frankreich/Nouvelle-Aquitaine, Region/Creuse, Département/Aubusson, Arrondissement/Soumans/Montebras/Montebras Mine

Preface

Name from

der Grube Montebras, der Typlokalität.
Lit.: Mark Ivan Jacobson: The Where of Mineral Names: Montebrasite: Stockscheider Pegmatite, Montebras Quarry: Montebras Hamlet, Soumans Commune, Creuse Department, France. Rocks & Minerals Vol. 99, Nr. 2 (2024) S. 181-188.

Author (Name, Year)

Des Cloizeaux, 1871

References

Handbook of Mineralogy (Anthony et al.), 4 (2000), 386

Other languages

German

Montebrasit

Spanish

Montebrasita

English

Montebrasite

French

Montebrasite

Russian

Монтебразит

Simplified Chinese

羟磷锂铝石

Traditional Chinese

羥磷鋰鋁石

CNMNC symbol

Symbol

Mbs

Locations with GPS information

IDs

GUSID (Global unique identifier short form) e4tm7GB8GEm5J0-2d0w2sg
GUID (Global unique identifier) EC668B7B-7C60-4918-B927-4FB6774C36B2
Database ID 2587