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Bahianite

Pictures (4 Images total)

Bahianit
Views (Image: 1206228130): 2151
Bahianit

bräunliches, abgerolltes Aggregat, Größe: 7 mm; Fundort: Pico-das-Almas-Fluss, Paramirim das Crioulas, Érico Cardoso, Bahia, Nordosten (Região Nordeste), Brasilien (TL)

Copyright: Hg
Contribution: Hg 2008-03-23
Locality: Pico das Almas, Fluss / Paramirim das Crioulas / Érico Cardoso / Bahia / Nordosten (Região Nordeste) / Brasilien
Bahianit
Views (Image: 1258156884): 1360
Bahianit

abgerollte Körner, Größe: 4 mm; Fundort: Pico-das-Almas-Fluss, Paramirim das Crioulas, Érico Cardoso, Bahia, Nordosten (Região Nordeste), Brasilien (TL)

Copyright: Maurice de Graaf
Contribution: slugslayer 2009-11-14
Locality: Pico das Almas, Fluss / Paramirim das Crioulas / Érico Cardoso / Bahia / Nordosten (Região Nordeste) / Brasilien
Bahianit
Views (Image: 1262917447): 1317
Bahianit

Größe: 20 mm; Fundort: Pico das Almas, Paramirim das Crioulas, Érico Cardoso, Bahia, Nordosten (Região Nordeste), Brasilien

Copyright: Paul Bongaerts
Contribution: slugslayer 2010-01-08
Locality: Pico das Almas, Fluss / Paramirim das Crioulas / Érico Cardoso / Bahia / Nordosten (Região Nordeste) / Brasilien
Bahianit
Views (Image: 1479901387): 518
Bahianit (SNr: A003 199)

vom Morro do Chapeu Prospekt am Pico das Almas River, Bahia, Brasilien, (Typlokalität), abgerolltes kieslförmiges Stück von gelblich brauner Farbe, BB = 11 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2016-11-23
Locality: Pico das Almas, Fluss / Paramirim das Crioulas / Érico Cardoso / Bahia / Nordosten (Região Nordeste) / Brasilien

Collectors Summary

Color farblos, violett, cremeweiß, hellbraun
Streak color weiß
Hardness (Mohs) 9
Solubility - Säuren, Alkalien
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

Al5Sb5+3O14(OH)2

Chem­ical com­po­si­tion

Aluminium, Antimon, Sauerstoff, Wasserstoff

Unit weight: 758.194765 u; Number of atoms in the formula: 26

Info

Empirical formula:

Al5Sb3O14(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.27

2

7.69

1.0079470

2.0158940

Oxygen

O

33.76

16

61.54

15.9994300

255.9908800

Aluminium

Al

17.79

5

19.23

26.9815382

134.9076910

Antimony

Sb

48.18

3

11.54

121.7601000

365.2803000

Anal­y­sis wt%

Ø Sb2O5 : 57.28, Al2O3 : 35.37, Fe2O3 : 1.04, WO3 : 1.20, BeO : 0.75, SiO2 : 1.03, H2O : 2.77 (Ref: Mineralogical Magazine 78)

Strunz 9th edi­tion incl. updates

4.DC.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
C: Mit mittelgroßen [Kationen]: Lagen kantenverknüpfter Oktaeder
05:Bahianit-Gruppe

Lapis Clas­sifica­tion

IV/D.27-010

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Clas­sifica­tion by Hölzel

4.DK.190

4: OXIDES
D: Dioxides
K: Other Niobates, Tantalates
1: Cervantite-Group

Dana 8th edi­tion

44.03.07.01

44: Antimonates
03: Antimonates with miscellaneous formulae

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, violett, cremeweiß, hellbraun

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.11

Birefringence chart\! Bahianite title=Birefringence chart Bahianite

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

1.81

RI value β

1.87

RI value γ / ε

1.92

Ri mean

1.867

2V angle

Biaxial (-) 83°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.406

Cell param­e­ters b (Å)

11.541

Cell param­e­ters c (Å)

4.410

Cell param­e­ters a/b or c/a

0.815

Cell param­e­ters c/b

0.382

Cell param­e­ters α

90°

Cell param­e­ters β

90.93

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

478.663

X-Ray Pow­der Diffrac­tion

4.712(70),
3.241(100),
3.194(100),
2.457(70),
2.411(70),
2.156(80),
1.648(70),
1.635(70)

XRD chart Bahianite

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)

9

VHN (Hard­ness Vick­ers)

3650 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.89 - 5.46 / Durchschnittlich = 5.17

5.26 ( ρ calc. Mineralienatlas )

Insta­bil­ity

- Säuren, Alkalien

Preface

Author (Name, Year)

Moore & Araki, 1976

References

Mineralogical Magazine 42 (1978), 179

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Bahianite

Al5Sb5+3O14(OH)2

monoklin : 2/m : C2/m

4.DC.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Bahianite

Al5Sb5+3O14(OH)2

monoklin : 2/m : C2/m

IV/D.27-010

Simpsonite

Al4Ta3O13(OH)

trigonal : 3 : P3

IV/D.27-020

Alumotantite

AlTaO4

orthorhombisch : mmm : Pbcn

IV/D.27-030

Rankamaite

(Na,K)3(Ta,Nb,Al)11(O,OH)31

orthorhombisch : 222 : C222

IV/D.27-040

Sosedkoite

(K,Na)5Al2(Ta,Nb)22O60

orthorhombisch : mmm : Cmmm

IV/D.27-050

Billwiseite

Sb3+5(Nb,Ta)3WO18

monoklin : 2/m : C2/c

IV/D.27-060

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Cervantite

Sb3+Sb5+O4

orthorhombisch : mm2 : Pna21

4.DK.100

Clinocervantite

Sb3+Sb5+O4

monoklin : 2/m : C2/c

4.DK.105

Stibiocolumbite

SbNbO4

orthorhombisch : mm2 : Pc21n

4.DK.110

Stibiotantalite

Sb3+TaO4

orthorhombisch : mm2 : Pc21n

4.DK.120

Bismutotantalite

Bi(Ta,Nb)O4

orthorhombisch : mmm : Pcnn

4.DK.130

Bismutocolumbite

Bi(Nb,Ta)O4

orthorhombisch : mmm : Pcnn

4.DK.140

Rosiaite

PbSb2O6

trigonal : 3m : P31m

4.DK.150

Alumotantite

AlTaO4

orthorhombisch : mmm : Pbcn

4.DK.160

Simpsonite

Al4Ta3O13(OH)

trigonal : 3 : P3

4.DK.180

Bahianite

Al5Sb5+3O14(OH)2

monoklin : 2/m : C2/m

4.DK.190

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Swedenborgite

NaBe4SbO7

hexagonal : 6mm : P63mc

44.03.01.01

Manganostibite

(Mn2+,Fe2+)7(SbO4)(AsO4,SiO4)O4

orthorhombisch : mmm : Ibmm

44.03.02.01

Parwelite

Mn2+10Sb5+2As5+2Si2O24

monoklin : m : Aa

44.03.03.01

Långbanite

(Mn2+,Ca,Fe,Mg)4(Mn3+,Fe3+)9Sb5+[O16(SiO4)2]

monoklin : 2/m : C2/m

44.03.04.01

Katoptrite

Mn2+13Al4Sb5+2O20(SiO4)2

monoklin : 2/m : C2/m

44.03.05.01

Yeatmanite

Mn92+Zn6Sb25+Si4O28

triklin : 1 : P1

44.03.06.01

Bahianite

Al5Sb5+3O14(OH)2

monoklin : 2/m : C2/m

44.03.07.01

Shakhovite

Hg41+Sb5+O3(OH)3

monoklin : m : Im

44.03.08.01

'Cualstibite-1M' (Pol.v. Cualstibite)

Cu5Al2Sb3+3O12(OH)·12H2O

monoklin : 2/m : P21/c

44.03.09.01

CNMNC (IMA)-Number

IMA 1974-027

CNMNC symbol

Symbol

Bhi

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

German pages

DeWikiPedia - search for: Bahianit
Google-Bilder-Suche - search for: Bahianit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Bahianit

English pages

Mindat - search for: Bahianite
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RRUFF - References and PDF downloads - search for: Bahianite
American-Mineralogist-Crystal-Structure-Database - search for: Bahianite
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Russian pages

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German pages

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