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Deltalumite

Collectors Summary

Crystal System tetragonal, P4m2
Morphology rundliche Aggregate bis 0.2 mm, die aus gedrungenen prismatischen xx bis 0.03 mm bestehen

Chemism

Chem­ical formula

Al2O3

Chem­ical com­po­si­tion

Aluminium, Sauerstoff

Unit weight: 101.9613664 u; Number of atoms in the formula: 5

Info

Empirical formula:

Al2O3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

47.07

3

60.00

15.9994300

47.9982900

Aluminium

Al

52.93

2

40.00

26.9815382

53.9630764

Anal­y­sis wt%

99.74 Al2O3, 0.04 SiO2

Strunz 9th edi­tion incl. updates

4.BB.5

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
B: Metall: Sauerstoff = 3:4 und vergleichbare
B: Mit ausschließlich mittelgroßen [Kationen]
5:

IMA sta­tus

anerkannt - Mineralogical Magazine, 2016, Vol. 80(5), pp. 915-922

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Spinel supergroup  ⇒ Oxyspinel group  ⇒ Spinel subgroup

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

42m

Space Group number

115

Space Group

P4m2

Cell param­e­ters a (Å)

5.608(1)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

23.513(7)

Cell param­e­ters a/b or c/a

4.193

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

16

Volumne (ų)

739.476

Kristall struc­ture

Ein Dimorph von Korund

X-Ray Pow­der Diffrac­tion

2.728(61),
2.424(51),
2.408(49),
2.281(42),
1.993(81),
1.954(48),
1.948(32),
1.396(100)

XRD chart Deltalumite

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

Morphol­ogy

rundliche Aggregate bis 0.2 mm, die aus gedrungenen prismatischen xx bis 0.03 mm bestehen

Physical Properties

Density (g/cm³)

3.663 ber.

3.663 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Kamtschatka Oblast/Tolbachik-Vulkan/2012-2013 Fissure Tolbachik Eruption site

Type mate­r­ial

Fersman Mineralogical Museum, Russian Academy of Sciences, Moskau, Russland

Col­lec­tion number of type mate­r­ial

4767/1

Preface

Author (Name, Year)

I. V. Pekov, I. P. Anikin, N. V. Chukanov, D. I. Belakovskiy, V. O. Yapaskurt, E. G. Sidorov, S. N. Britvin, N. V. Zubkova (2020)

References

I. V. Pekov, I. P. Anikin, N. V. Chukanov, D. I. Belakovskiy, V. O. Yapaskurt, E. G. Sidorov, S. N. Britvin, N. V. Zubkova: Deltalumite, a New Natural Modification of Alumina with a Spinel-Type Structure. Geology of Ore Deposits Vol. 62, Issue 7 (2020) S. 608–617.

Pekov, I.V., Anikin, L.P., Chukanov, N.V., Belakovskiy, D.I., Yapaskurt, V.O., Sidorov, E.G., Britvin, S.N. and Zubkova, N.V. (2016) Deltalumite, IMA 2016-027. CNMNC Newsletter No. 32, August 2016, page 919; Mineralogical Magazine, 80, 915-922

IMA group assignments

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

Guite

Co2+Co3+2O4

kubisch : m3m : Fd3m

4.BB.5

Deltalumite

Al2O3

tetragonal : 42m : P4m2

4.BB.5

Dellagiustaite

V2+Al2O4

kubisch : m3m : Fd3m

4.BB.5

Thermaerogenite

CuAl2O4

kubisch : m3m : Fd3m

4.BB.5

CNMNC (IMA)-Number

IMA 2016-027

CNMNC symbol

Symbol

Dal

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

German pages

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

English pages

Mindat - search for: Deltalumite
Webmineral - search for:Deltalumite
Handbook-of-Mineralogy - search for: Deltalumite
RRUFF - Raman, XRD and other mineral data - search for: Deltalumite
RRUFF - References and PDF downloads - search for: Deltalumite
American-Mineralogist-Crystal-Structure-Database - search for: Deltalumite
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Russian pages

Webmineral.ru - search for: Дельталумит

Mineral Dealer

German pages

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Locations with GPS information