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Allendeite (Allendeit)

Collectors Summary

Crystal System trigonal, R3

Chemism

Chemical formula

Sc4Zr3O12

Additional chem. information

neuer Strukturtyp

Chemical composition

Scandium, Zirconium, Sauerstoff

Unit weight: 645.4894032 u; Number of atoms in the formula: 19

Info

Empirical formula:

Sc4Zr3O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

29.74

12

63.16

15.9994300

191.9931600

Scandium

Sc

27.86

4

21.05

44.9559108

179.8236432

Zirconium

Zr

42.40

3

15.79

91.2242000

273.6726000

Analysis wt%

TiO2 : 5.47, ZrO2 : 56.58, HfO2 : 1.21, Al2O3 : 0.70, Sc2O3 : 32.36, FeO : 0.82, Y2O3 : 0.70, CaO : 2.74 (Ref: 40th Lun.Plan.Sci.Conf.2009)

Strunz 9th edition incl. updates

4.C

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C:

Lapis Classification

IV/D.31-015

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

Classification by Hölzel

4.CP.400

4: OXIDES
C: R2O3 Sesquioxides
P: Pseudobrookite-Group

Dana 8th edition

04.06.08

04: Oxide Minerals
06: Simple Oxides not classified

IMA status

anerkannt; IMA Veröffentlichungen - Neue Mineralien 10/2007

Mineral status

anerkanntes Mineral

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

9.396

Cell parameters b (Å)

-

Cell parameters c (Å)

8.720

Cell parameters a/b or c/a

0.928

Cell parameters c/b

-

Z

3

Volume (ų)

666.704

X-Ray Powder Diffraction

4.698(5), 2.900(100), 2.513(18), 1.779(27), 1.776(32), 1.515(19), 1.450(4), 1.152(4)

XRD chart Allendeite

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

Physical Properties

Density (g/cm³)

4.84 (berechnet)

4.823 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Chi Ma, 2007

References

IMA Veröffentlichungen - Neue Mineralien 10/2007

Chi Ma, John R. Beckett, George R. Rossman: Allendeite (Sc4Zr3O12) and hexamolybdenum (Mo,Ru,Fe), two new minerals from an ultrarefractory inclusion from the Allende meteorite. American Mineralogist Vol. 99 (2014) S. 654-666.

Other languages

German

Allendeit

Spanish

Allendeita

English

Allendeite

Russian

Аллендеит

Simplified Chinese

钪锆矿

CNMNC (IMA)-Number

IMA 2007-027

CNMNC symbol

Symbol

Aed

Locations with GPS information

IDs

GUSID (Global unique identifier short form) kN3Dip4zKUKvHyp2KagcfQ
GUID (Global unique identifier) 8AC3DD90-339E-4229-AF1F-2A7629A81C7D
Database ID 4785



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