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Ammonioalunite (Ammonioalunit)

Pictures (2 Images total)

AMMONIOALUNIT mit ged. Schwefel
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1349735804
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AMMONIOALUNIT mit ged. Schwefel
Absetzerhalde des SDAG Wismut Bergbau Revier Ronneburg, Thüringen, (D) BB.: ca. 10mm; (Ex-Slg.: F.Rüger)
Copyright: Daniel Neumann; Contribution: Neumann
Collection: Daniel Neumann, Collection number: 00704.
Location: Deutschland/Thüringen/Greiz, Landkreis/Ronneburg/Absetzerhalde
Mineral: Ammonioalunite
Image: 1349735804
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
AMMONIOALUNIT mit ged. Schwefel (SNr: 00704.)

Absetzerhalde des SDAG Wismut Bergbau Revier Ronneburg, Thüringen, (D) BB.: ca. 10mm; (Ex-Slg.: F.Rüger)
Collection: Daniel Neumann
Copyright: Daniel Neumann
Contribution: Neumann 2012-10-09
Locality: Absetzerhalde / Ronneburg / Greiz, Landkreis / Thüringen / Deutschland
blumenkohlartiger Apjohnit mit Pickeringit
Views (File:
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blumenkohlartiger Apjohnit mit Pickeringit
Tschechien/Mittelböhmen, Region (Stredocesky kraj)/Kladno, Bezirk/Libusin/Kladno Mine (Schöller Mine; Nejedlý I Mine; Zdenek Nejedlý Mine; Schoeller Mine), BB = 1,8 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A013453, Donator: anatase2
Location: Tschechien/Mittelböhmen (Středočeský kraj)/Kladno, Bezirk/Libusin/Kladno Mine (Schöller Mine; Schoeller Mine; Zdenek Nejedlý Mine; Nejedlý I Mine)
Mineral: Ammonioalunite, Pickeringite
Image: 1598449588
License: Usage for Mineralienatlas project only
blumenkohlartiger Apjohnit mit Pickeringit (SNr: A013453)

Tschechien/Mittelböhmen, Region (Stredocesky kraj)/Kladno, Bezirk/Libusin/Kladno Mine (Schöller Mine; Nejedlý I Mine; Zdenek Nejedlý Mine; Schoeller Mine), BB = 1,8 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2020-08-26
Locality: Kladno Mine (Schöller Mine; Schoeller Mine; Zdenek Nejedlý Mine; Nejedlý I Mine) / Libusin / Kladno, Bezirk / Mittelböhmen (Středočeský kraj) / Tschechien

You find additional Ammonioalunit specimen at the Geolitho Museum

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 3.50 - 4.00
Solubility +++ KOH, ++ kalte verdünnte H2SO4, + kalte verdünnte HCl
Crystal System trigonal, R3m, R3m

Chemism

Chemical formula

NH4Al3(SO4)2(OH)6

Chemical composition

Aluminium, Sauerstoff, Schwefel, Stickstoff, Wasserstoff

Unit weight: 393.1538246 u; Number of atoms in the formula: 30

Info

Empirical formula:

NH4Al3(SO4)2(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.56

10

33.33

1.0079470

10.0794700
Nitrogen

N

3.56

1

3.33

14.0067200

14.0067200
Oxygen

O

56.97

14

46.67

15.9994300

223.9920200
Aluminium

Al

20.59

3

10.00

26.9815382

80.9446146
Sulfur

S

16.31

2

6.67

32.0655000

64.1310000

Strunz 9th edition incl. updates

7.BC.10

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
B: Sulfate (Selenate, etc.) mit weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen [Kationen]
10:Alunit-Gruppe

Lapis Classification

VI/B.11-030

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
B: Wasserfreie Sulfate, mit fremden Anionen
11: Große Kationen vorwiegend; Alunit-Gruppe

Classification by Hölzel

7.BB.200

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
B: Sulfates (+Anions -Water)
B: Alunite-Group (sulfatian)
2: Alunites with NH4+, H+, H3O+

Dana 8th edition

30.02.04.06

30: Anhydrous Sulfates Containing Hydroxyl or Halogen
02: Anhydrous Sulfates Containing Hydroxyl or Halogen where (A B)2 XO4 Zq
04: Alunite Group (Alunite Subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Alunite supergroup  ⇒ Alunite group with -1c

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.012
Birefringence chart\! Ammonioalunite title=Birefringence chart Ammonioalunite

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

1.590

RI value γ / ε

1.602

Ri mean

1.594

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3m, 3m

Space Group number

160, 166

Space Group

R3m, R3m

Cell parameters a (Å)

7.013

Cell parameters b (Å)

-

Cell parameters c (Å)

17.885

Cell parameters a/b or c/a

2.550

Cell parameters c/b

-

Z

3

Volumne (ų)

761.776

X-Ray Powder Diffraction

5.04(90),
3.514(20),
3.023(100),
2.996(50),
2.353(30),
1.917(30),
1.753(20),
1.540(20)
XRD chart Ammonioalunite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.50 - 4.00

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.4 (gemessen) 2.58 (berechnet)

2.571 ( ρ calc. Mineralienatlas )

Instability

+++ KOH, ++ kalte verdünnte H2SO4, + kalte verdünnte HCl

(Co-)Type locality

(Co-)Type locality

USA/Kalifornien (California)/Sonoma Co./The Geysers

Preface

Author (Name, Year)

Altaner & Fitzpatrick & Krohn & Bethke & Hayba & Goss & Brown, 1988

References

American Mineralogist 73 (1988), 145

IMA group assignments

 
Alunite supergroup
DG3(TX4)2X’6
 
 

 
 
Alunite group with -1c
 
 
 

 
 
 
Alunite
KAl3(SO4)2(OH)6
trigonal
R3m

 
 
 
Ammonioalunite
NH4Al3(SO4)2(OH)6
trigonal
R3m, R3m

 
 
 
Ammoniojarosite
NH4Fe3+3(SO4)2(OH)6
trigonal
R3m

 
 
 
Argentojarosite
AgFe3+3(SO4)2(OH)6
trigonal
R3m

 
 
 
Beaverite-(Cu)
Pb(Fe3+2Cu)(SO4)2(OH)6
trigonal
R3m

 
 
 
Beaverite-(Zn)
Pb(Fe3+2Zn)(SO4)2(OH)6
trigonal
R3m

 
 
 
Dorallcharite
(Tl,K)Fe3+3[(OH)6|(SO4)2]
trigonal
R3m

 
 
 
Hydroniumjarosite
(H3O)Fe3+3(SO4)2(OH)6
trigonal
R3m

 
 
 
Jarosite
KFe3+3(SO4)2(OH)6
trigonal
R3m

 
 
 
Natroalunite-1c
NaAl3(SO4)2(OH)6
trigonal
R3m

 
 
 
Natrojarosite
NaFe3+3(SO4)2(OH)6
trigonal
R3m

 
 
 
Osarizawaite
Pb(Al2Cu2+)(SO4)2(OH)6
trigonal
R3m

 
 
 
Schlossmacherite
(H3O,Ca)Al3(AsO4,SO4)2(OH)6
trigonal
R3m

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Actuality: 23. Mar 2023 - 06:33:10

Other languages

German

Ammonioalunit

French

Ammonioalunite

English

Ammonioalunite

Spanish

Amonioalunita

Russian

Аммониоалунит

Alternative Name

Spanish

Ammonioalunita

CNMNC (IMA)-Number

IMA 1986-037

CNMNC symbol

Symbol

Aalu

Locations with GPS information