https://www.edelsteine-neuburg.de
http://www.spessartit.de/walldorf.html
https://www.mineraliengrosshandel.com
https://www.mineralbox.biz
https://www.mineral-bosse.de
'._('einklappen').'
 

Armalcolite (Armalcolit)

Pictures (1 Images total)

Armalcolit: vmtl. ein Mischkristall zu Pseudobrookit
Views (File:
1295642521
): 1981
Armalcolit: vmtl. ein Mischkristall zu Pseudobrookit
Brauner langtafeliger Kristall; Finder ist Senor Barahona, Mondmineral (nach Armstrong, Aldrin und Colins benannt) BB = 2,5 mm. Fundort: Cerro de la Cabezuela, la Aljorra Quarries, Cartagena, Murcia, Spanien;
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A019829, Donator: anatasi
Location: Spanien/Murcia/Sierra de Cartagena/La Aljorra/La Aljorra Quarries
Mineral: Armalcolite
Image: 1295642521
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Armalcolit: vmtl. ein Mischkristall zu Pseudobrookit (SNr: A019829)  D

Brauner langtafeliger Kristall; Finder ist Senor Barahona, Mondmineral (nach Armstrong, Aldrin und Colins benannt) BB = 2,5 mm. Fundort: Cerro de la Cabezuela, la Aljorra Quarries, Cartagena, Murci...
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2011-01-21
Locality: La Aljorra Quarries / La Aljorra / Sierra de Cartagena / Murcia / Spanien

You find additional Armalcolit specimen at the Geolitho Museum

Collectors Summary

Color grau bis bräunlich
Crystal System orthorhombisch, Bbmm

Chemism

Chemical formula

(Mg,Fe2+,Al)(Ti4+,Fe3+)2O5

Chemical composition

Aluminium, Eisen, Magnesium, Titan, Sauerstoff

Unit weight: 213.75514982 u; Number of atoms in the formula: 8

Info

Empirical formula:

(Mg0.6Fe0.3Al0.1)(Ti0.75Fe0.25)2O5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

37.42

5

62.50

15.9994300

79.9971500
Magnesium

Mg

6.82

0.6

7.50

24.3050600

14.5830360
Aluminium

Al

1.26

0.1

1.25

26.9815382

2.6981538
Titanium

Ti

33.59

1.5

18.75

47.8671000

71.8006500
Iron

Fe

20.90

0.8

10.00

55.8452000

44.6761600

Analysis wt%

MgO : 9.34, FeO : 16.64, TiO2 : 74.02 (Ref: berechnet)

Strunz 9th edition incl. updates

4.CB.15

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
B: Mit mittelgroßen Kationen
15:Pseudobrookit-Gruppe

Lapis Classification

IV/C.24-010

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)

Classification by Hölzel

4.CP.100

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

Dana 8th edition

07.07.01.02

07: Multiple Oxides
07: Multiple Oxides with miscellaneous formulae

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pseudobrookite group

Optical Properties

Color

grau bis bräunlich

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

63

Space Group

Bbmm

Cell parameters a (Å)

9.752

Cell parameters b (Å)

10.048

Cell parameters c (Å)

3.736

Cell parameters a/b or c/a

0.971

Cell parameters c/b

0.372

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

5

Volumne (ų)

366.084

X-Ray Powder Diffraction

4.88(70),
3.48(100),
2.750(90),
2.221(40),
1.970(60),
1.867(80),
1.636(40),
1.544(70)
XRD chart Armalcolite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.94 (berechnet)

4.848 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Mond/Meer der Ruhe (Mare Tranquillitatis)/Apollo 11 Landungszone

Preface

Name from

Benannt nach der Besatzung von Apollo 11 (ARMstrongALdrinCOLlins), in deren Probenmaterial von der Landestelle im Meer der Ruhe das Mineral erstmals gefunden wurde.

Author (Name, Year)

Anderson & Bunch & Cameron & Haggerty & Boyd & Finger & James & Keil &

References

American Mineralogist 73 (1988), 1377

IMA group assignments

Other languages

German

Armalcolit

Spanish

Armalcolita

French

Armalcolite

English

Armalcolite

Russian

Армолколит

Simplified Chinese

低铁假板钛矿

Alternative Name

Kennedyit

Spanish

Kennedyita

English

Kennedyite

Simplified Chinese

镁铁钛矿

Simplified Chinese

阿尔马科月球石

CNMNC symbol

Symbol

Arm

Rock part of

Locations with GPS information