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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
Location: Aserbaidschan/Kobustan/Insel Bulla
Mineral: Akdalaite
Image: 1585485733
License: Usage for Mineralienatlas project only
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

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
Mineralienatlas.de (Forum) - 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
Strahlen.org - search for: Akdalaite

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
Geolitho marketplace, by and for collectors - search for: Akdalait

Locations with GPS information