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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

Volume (ų)

739.476

Crystal 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, Krai/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

Other languages

German

Deltalumit

English

Deltalumite

Russian

Дельталумит

CNMNC (IMA)-Number

IMA 2016-027

CNMNC symbol

Symbol

Dal

Locations with GPS information

IDs

GUSID (Global unique identifier short form) qBU8PBS9RUeioMH-DKHnJA
GUID (Global unique identifier) 3C3C15A8-BD14-4745-A2A0-C1FE0CA1E724
Database ID 8160