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Akdalaite

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Akdalait
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Akdalait

schmutzigweiße Massen von Akdalait, teilweise mit einschlüssen von ged. Aluminium in Glasampulle, Bulla Insel, Kaspisches Meer, Kobustan, Aserbaidschan; BB < 5 mm

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-29
Locality: Insel Bulla / Kobustan / Aserbaidschan

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 6.75
Crystal System hexagonal, P63mc

Chemism

Chem­ical formula

(Al2O3)5·H2O

Chem­ical com­po­si­tion

Aluminium, Sauerstoff, Wasserstoff

Unit weight: 527.822156 u; Number of atoms in the formula: 28

Info

Empirical formula:

(Al2O3)5·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.38

2

7.14

1.0079470

2.0158940

Oxygen

O

48.50

16

57.14

15.9994300

255.9908800

Aluminium

Al

51.12

10

35.71

26.9815382

269.8153820

Anal­y­sis wt%

Al2O3 : 96.59, H2O : 4.23 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

4.FM.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
M: Hydroxide mit H2O ± (OH); unklassifiziert
05:Akdalait-Gruppe

Lapis Clas­sifica­tion

IV/F.09-010

IV: OXIDE
F: Hydroxide und oxidische Hydrate (wasserhaltige Oxide mit Schichtstruktur)

Clas­sifica­tion by Hölzel

4.FC.700

4: OXIDES
F: Hydroxides and Hydrates (without V and U)
C: Oxihydroxides
7: Akaganeite-Group

Dana 8th edi­tion

04.03.02.01

04: Oxide Minerals
03: Simple Oxides with a cation charge of 3+ (A+++2 O3)

IMA sta­tus

anerkannt 1969 (2004 siehe Zusatzinformation)

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

weiß

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend

max. Birefrin­gence

0.006

Birefringence chart\! Akdalaite title=Birefringence chart Akdalaite

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

1.747

RI value γ / ε

1.741

Ri mean

1.745

2V angle

Uniaxial (-)

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

6mm

Space Group number

186

Space Group

P63mc

Cell param­e­ters a (Å)

5.58

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

8.86

Cell param­e­ters a/b or c/a

1.588

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

1

Volumne (ų)

238.909

X-Ray Pow­der Diffrac­tion

3.24(70),
2.494(90),
2.35(90),
2.32(80),
2.11(100),
1.418(100),
1.393(100),
0.993(90)

XRD chart Akdalaite

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)

6.75

VHN (Hard­ness Vick­ers)

1085

Density (g/cm³)

3.68

3.668 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Shpanov & Sidorenko & Stolyarova, 1970

Addi­tional Informa­tion

Die IMA hat ds Mineral formal 2004 anerkannt (IMA2004-051). Einige Mitglieder drängten jedoch auf eine Nachprüfung des Minerals (IMA1969-002). Nach Prüfung stellte sich heraus, dass die früher ermittelten Zellparameter falsch waren und die Minerale identisch sind. Die Anerkennung des Minerals IMA2004-051 wird in Folge dessen annuliert.

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 99 (1970), 333

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

Akdalaite

(Al2O3)5·H2O

hexagonal : 6mm : P63mc

4.FM.05

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

Akdalaite

(Al2O3)5·H2O

hexagonal : 6mm : P63mc

IV/F.09-010

Ferrihydrite

Fe3+10O14(OH)2

hexagonal : 6mm : P63mc

IV/F.09-020

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

Akdalaite

(Al2O3)5·H2O

hexagonal : 6mm : P63mc

4.FC.700

Ferrihydrite

Fe3+10O14(OH)2

hexagonal : 6mm : P63mc

4.FC.720

Akaganeite

(Fe3+,Ni2+)8(OH,O)16Cl1.25·nH2O

monoklin : 2/m : I2/m

4.FC.730

Lithiophorite

(Al,Li)Mn4+O2(OH)2

trigonal : 3m : R3m

4.FC.750

Tivanite

V3+TiO3(OH)

monoklin : 2/m : P21/c

4.FC.770

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

Corundum

Al2O3

trigonal : 3m : R3c

04.03.01.01

Hematite

Fe2O3

trigonal : 3m : R3c

04.03.01.02

Eskolaite

Cr2O3

trigonal : 3m : R3c

04.03.01.03

Karelianite

V2O3

trigonal : 3m : R3c

04.03.01.04

Akdalaite

(Al2O3)5·H2O

hexagonal : 6mm : P63mc

04.03.02.01

Ferrihydrite

Fe3+10O14(OH)2

hexagonal : 6mm : P63mc

04.03.02.02

Perovskite

CaTiO3

orthorhombisch : mmm : Pbnm

04.03.03.01

Latrappite

(Ca,Na)(Nb,Ti,Fe)O3

orthorhombisch : mmm : Pbnm

04.03.03.02

Lueshite

NaNbO3

orthorhombisch : mmm : Pbma

04.03.03.04

Tausonite

SrTiO3

kubisch : m3m : Pm3m

04.03.03.05

Isolueshite

Na(Nb,Ti)O3

kubisch : m3m : Pm3m

04.03.03.06

Ilmenite

Fe2+TiO3

trigonal : 3 : R3

04.03.05.01

Geikielite

MgTiO3

trigonal : 3 : R3

04.03.05.02

Pyrophanite

MnTiO3

trigonal : 3 : R3

04.03.05.03

Ecandrewsite

(Zn,Fe2+,Mn2+)TiO3

trigonal : 3 : R3

04.03.05.04

Melanostibite

Mn(Sb5+,Fe3+)O3

trigonal : 3 : R3

04.03.05.05

Brizziite

NaSbO3

trigonal : 3 : R3

04.03.05.06

Akimotoite

(Mg,Fe2+)SiO3

trigonal : 3 : R3

04.03.05.07

Macedonite

PbTiO3

tetragonal : 4mm : P4mm

04.03.06.01

Maghemite

Fe2.67O4

kubisch : 432 : P4132, P4332

04.03.07.01

'Bixbyite group'

(Mn3+,Fe3+)2O3

kubisch : m3 : Ia3

04.03.07.02

Avicennite

Tl2O3

kubisch : m3 : Ia3

04.03.08.01

Arsenolite

As2O3

kubisch : m3m : Fd3m

04.03.09.01

Sénarmontite

Sb2O3

kubisch : m3m : Fd3m

04.03.09.02

Other languages

German

Akdalait

English

Akdalaite

French

Akdalaite

Spanish

Akdalaíta

Russian

Акдалаит

Alternative Name

Acdalait

Chudoba EIV, 1 (1974)

CNMNC (IMA)-Number

IMA 1969-002

IMA 2004-051

CNMNC symbol

Symbol

Akd

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

German pages

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

English pages

Mindat - search for: Akdalaite
Webmineral - search for:Akdalaite
Handbook-of-Mineralogy - search for: Akdalaite
RRUFF - Raman, XRD and other mineral data - search for: Akdalaite
RRUFF - References and PDF downloads - search for: Akdalaite
American-Mineralogist-Crystal-Structure-Database - search for: Akdalaite
Athena - search for: Akdalaite
Strahlen.org - search for: Akdalaite
Mineralienatls.de (Forum) - search for: Akdalait

Russian pages

Webmineral.ru - search for: Акдалаит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Akdalait
Crystal-Treasure.com - search for: Akdalait
Bosse - search for: Akdalait
Edelsteine Neuburg - Gundolf Fischer - search for: Akdalait

Locations with GPS information