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Alumino-barroisite

Collectors Summary

Color grün bis blau
Hardness (Mohs) 5 - 6
Crystal System monoklin, C2/m

Additional information / Summary

Die Amphibol-Nomenklatur 2012 hat die Mineralien in der Barroisit-Gruppe neu definiert. Aluminobarroisit wurde diskreditiert und die Proben, die vor 2012 als Aluminobarroisite analysiert wurden, gelten nun als Barroisite.

Chemism

Chem­ical formula

☐CaNaMg3Al2(Si7Al)O22(OH)2

Chem­ical com­po­si­tion

Aluminium, Calcium, Magnesium, Natrium, Silicium, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 799.52888881 u; Number of atoms in the formula: 42

Info

Empirical formula:

VcCaNaMg3Al2(Si7Al)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1

2.38

0.0000000

0.0000000

Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940

Oxygen

O

48.03

24

57.14

15.9994300

383.9863200

Sodium

Na

2.88

1

2.38

22.9897702

22.9897702

Magnesium

Mg

9.12

3

7.14

24.3050600

72.9151800

Aluminium

Al

10.12

3

7.14

26.9815382

80.9446146

Silicon

Si

24.59

7

16.67

28.0855300

196.5987100

Calcium

Ca

5.01

1

2.38

40.0784000

40.0784000

Anal­y­sis wt%

SiO2 : 50.80, Al2O3 : 18.47, FeO : 7.81, MgO : 10.22, CaO : 6.77, Na2O : 3.74, H2O : 2.18 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

9.DE.20

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
20:

Clas­sifica­tion by Hölzel

9.DI.330

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
I: Amphiboles; Sodiccalcic Amphiboles
3: Barroisite-Group

Dana 8th edi­tion

66.01.03b.05a

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03b: Group 3, the sodic-calcic amphiboles

IMA sta­tus

Die Amphibol-Nomenklatur 2012 hat die Mineralien in der Barroisit-Gruppe neu definiert. Aluminobarroisit wurde diskreditiert und die Proben, die vor 2012 als Aluminobarroisite analysiert wurden, gelten nun als Barroisite.

Min­eral sta­tus

Mineralstatus fragwürdig

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Sodium-calcium amphiboles  ⇒ Barroisite (Bar) amphiboles

Optical Properties

Color

grün bis blau

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters α

90°

Cell param­e­ters γ

90°

Z

2

Physical Properties

Hard­ness (Mohs)

5 - 6

Preface

Author (Name, Year)

Leake, 1978

References

Canadian Mineralogist 35 (1997), 219

IMA group assignments

Other languages

German

Alumino-Barroisit

English

Alumino-barroisite

Spanish

Aluminobarroisita

French

Aluminobarroisite

Alternative Name

German

Aluminobarroisit

English

Aluminobarroisite

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Alumino-Barroisit
Google-Bilder-Suche - search for: Alumino-Barroisit
Mineralienatlas.de (Forum) - search for: Alumino-Barroisit

English pages

Mindat - search for: Alumino-barroisite
Webmineral - search for:Alumino-barroisite
Handbook-of-Mineralogy - search for: Alumino-barroisite
RRUFF - Raman, XRD and other mineral data - search for: Alumino-barroisite
RRUFF - References and PDF downloads - search for: Alumino-barroisite
American-Mineralogist-Crystal-Structure-Database - search for: Alumino-barroisite
Strahlen.org - search for: Alumino-barroisite

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Alumino-Barroisit
Crystal-Treasure.com - search for: Alumino-Barroisit
Bosse - search for: Alumino-Barroisit
Edelsteine Neuburg - Gundolf Fischer - search for: Alumino-Barroisit
Geolitho marketplace, by and for collectors - search for: Alumino-Barroisit

Locations with GPS information