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

Angastonite (Angastonit)

Pictures (3 Images total)

Angastonit
Views (File:
1276342594
): 2048
Angastonit
stängelige Kristalle, weiß, porzellanartig, rosettenartig angeordnet, BB: 2,9 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A019639, Donator: Vince Peisley
Location: Australien/South Australia/Mt. Lofty Ranges/South Mt Lofty Ranges/Barossa Valley/Angaston/Penrice marble quarry
Mineral: Angastonite
Image: 1276342594
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Angastonit (SNr: A019639)

stängelige Kristalle, weiß, porzellanartig, rosettenartig angeordnet, BB: 2,9 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2010-06-12
Locality: Penrice marble quarry / Angaston / Barossa Valley / South Mt Lofty Ranges / Mt. Lofty Ranges / South Australia / Australien
Angastonit
Views (File:
1276342069
): 936
Angastonit
porzellanweiße, stängelige, rosettenartig aggregierte Kristalle; BB: 3 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A019639, Donator: Vince Peisley
Location: Australien/South Australia/Mt. Lofty Ranges/South Mt Lofty Ranges/Barossa Valley/Angaston/Penrice marble quarry
Mineral: Angastonite
Image: 1276342069
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Angastonit (SNr: A019639)

porzellanweiße, stängelige, rosettenartig aggregierte Kristalle; BB: 3 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2010-06-12
Locality: Penrice marble quarry / Angaston / Barossa Valley / South Mt Lofty Ranges / Mt. Lofty Ranges / South Australia / Australien
Angastonit
Views (File:
1275831820
): 872
Angastonit
Bildbreite: 4 mm, Fundort: Penrice marble quarry, Angaston, Barossa Valley, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Australien/South Australia/Mt. Lofty Ranges/South Mt Lofty Ranges/Barossa Valley/Angaston/Penrice marble quarry
Mineral: Angastonite
Image: 1275831820
Rating: 3 (votes: 2)
License: Usage for Mineralienatlas project only
Angastonit

Bildbreite: 4 mm, Fundort: Penrice marble quarry, Angaston, Barossa Valley, North Mt Lofty Ranges, Mt Lofty Ranges, South Australia, Australia
Copyright: Luigi Chiappino
Contribution: thdun5 2010-06-06
Locality: Penrice marble quarry / Angaston / Barossa Valley / South Mt Lofty Ranges / Mt. Lofty Ranges / South Australia / Australien

You find additional Angastonit specimen at the Geolitho Museum

Collectors Summary

Color schneeweiß
Streak color weiß
Lustre Perlmuttglanz
Hardness (Mohs) 2
Cleavages one direction nach (010)
Crystal System triklin, P1

Chemism

Chemical formula

CaMgAl2(PO4)2(OH)4·7H2O

Chemical composition

Aluminium, Calcium, Magnesium, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 502.4262748 u; Number of atoms in the formula: 43

Info

Empirical formula:

CaMgAl2(PO4)2(OH)4·7H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

3.61

18

41.86

1.0079470

18.1430460
Oxygen

O

60.50

19

44.19

15.9994300

303.9891700
Magnesium

Mg

4.84

1

2.33

24.3050600

24.3050600
Aluminium

Al

10.74

2

4.65

26.9815382

53.9630764
Phosphorus

P

12.33

2

4.65

30.9737612

61.9475224
Calcium

Ca

7.98

1

2.33

40.0784000

40.0784000

Analysis wt%

P2O5 : 28.25, Al2O3 : 20.30, MgO : 8.02, CaO : 11.05, K2O : 0.09, H2O : 32.29 (Ref: Mineralogical Magazine 2008)

Strunz 9th edition incl. updates

8.DL.25

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
L: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 = 2:1
25:

Lapis Classification

VII/D.50-003

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
50: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K

Classification by Hölzel

8.DL.370

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
L: very large=2, very small-medium=2+3
3: Montgomeryite-Group

Mineral status

anerkanntes Mineral

Optical Properties

Color

schneeweiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Perlmuttglanz

max. Birefringence

0.018
Birefringence chart\! Angastonite title=Birefringence chart Angastonite

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

1.566

RI value β

1.572

RI value γ / ε

1.584

Ri mean

1.574

2V angle

Biaxial (+) 70°

Pleochroism

Im Durchlicht farblos, sehr schwacher Pleochroismus von X = farblos über Y = farblos bis blassgelb nach Z = farblos, keine Dispersion

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

13.303

Cell parameters b (Å)

27.020

Cell parameters c (Å)

6.107

Cell parameters a/b or c/a

0.492

Cell parameters c/b

0.226

Cell parameters α

89.63

Cell parameters β

83.43

Cell parameters γ

80.47

Z

6

Volumne (ų)

2150.457

X-Ray Powder Diffraction

12.902(100), 9.944(11), 7.859(2), 19.429(1)
XRD chart Angastonite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

2

VHN (Hardness Vickers)

32 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.47 gem.

2.328 ( ρ calc. Mineralienatlas )

Cleavages

one direction nach (010)

(Co-)Type locality

(Co-)Type locality

Australien/South Australia/Mt. Lofty Ranges/South Mt Lofty Ranges/Barossa Valley/Angaston/Penrice marble quarry

Preface

Name from

locus typicus

Author (Name, Year)

Stuart J. Mills, 2008

References

Neue Mineralien - IMA WEB Seite Mai 2008 - Mineralien Welt 03/09, Steffen Jahn, Neue Mineralien

IMA 21-J: redefinition of angastonite as an amorphous mineral - Nomenclature/classification proposals approved in January 2022 - CNMNC Newsletter 65, Eur. J. Mineral., 34, 143–148, 2022; https://doi.org/10.5194/ejm-34-143-2022

Other languages

German

Angastonit

Spanish

Angastonita

English

Angastonite

Russian

Ангастонит

CNMNC (IMA)-Number

IMA 2008-008

CNMNC symbol

Symbol

Ags

Locations with GPS information