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Natroalunite-1c

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Natroalunit

Größe: 45x35 mm, Fundort: Planet Mine, Buckskin Mts, Santa Maria District, La Paz Co., Arizona, USA

Copyright: John Sobolewski
Contribution: slugslayer 2010-05-16
Locality: Planet Mine / Planet Mine Group / Planet / Santa Maria District / Buckskin Mts / La Paz Co. / Arizona / USA

Collectors Summary

Color weiß, graulich, gelblich, rötlich, bräunlich
Streak color weiß
Hardness (Mohs) 3.75
Solubility +++ Säuren
Crystal System trigonal, R3m

Chemism

Chem­ical formula

Na2Al3(SO4)2(OH)6

Chem­ical com­po­si­tion

Aluminium, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 421.094857 u; Number of atoms in the formula: 27

Info

Empirical formula:

Na2Al3(SO4)2(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.44

6

22.22

1.0079470

6.0476820

Oxygen

O

53.19

14

51.85

15.9994300

223.9920200

Sodium

Na

10.92

2

7.41

22.9897702

45.9795404

Aluminium

Al

19.22

3

11.11

26.9815382

80.9446146

Sulfur

S

15.23

2

7.41

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.11-010

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

Clas­sifica­tion by Hölzel

7.BB.100

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
B: Sulfates (+Anions -Water)
B: Alunite-Group (sulfatian)
1: Alunites with alkalies, Ag, Tl

Dana 8th edi­tion

30.02.04.02

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

Neudefinition von der CNMNC anerkannt

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Alunite supergroup  ⇒ Alunite group with -1c

Optical Properties

Color

weiß, graulich, gelblich, rötlich, bräunlich

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis teilweise opak

max. Birefrin­gence

0.022

Birefringence chart\! Natroalunite-1c title=Birefringence chart Natroalunite-1c

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

1.568

RI value γ / ε

1.590

Ri mean

1.575

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

 

gelb

LW-UV Intensity

schwach

Color SW-UV (254nm)

 

weiß

SW-UV Intensity

schwach

LW-UV Other Col­ors

 

blau

SW-UV Other Col­ors

   

bläulich weiß, blau

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell param­e­ters a (Å)

6.977

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

16.74

Cell param­e­ters a/b or c/a

2.399

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

705.706

X-Ray Pow­der Diffrac­tion

4.93(100),
3.52(10),
2.992(20),
2.970(40),
2.935(10),
2.228(20),
1.903(20),
1.754(10)

XRD chart Natroalunite-1c

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

3.75

VHN (Hard­ness Vick­ers)

160 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.6 - 2.9 / Durchschnittlich = 2.75

2.972 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Hillebrand & Penfield, 1902

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 484

P. Bayliss, U. Kolitsch, E.H. Nickel, A. Pring: Alunite supergroup: recommended nomenclature. Mineral. Mag. 74 (2010) S.919-927.

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Alunite

KAl3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Huangite

Ca0.5Al3[(OH)6|(SO4)2]

trigonal : 3m : R3m

7.BC.10

Jarosite

KFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Walthierite

Ba0.5Al3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Natroalunite-1c

Na2Al3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Osarizawaite

Pb(Al2Cu2+)(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Dorallcharite

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

trigonal : 3m : R3m

7.BC.10

Natrojarosite

NaFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Ammonioalunite

NH4Al3(SO4)2(OH)6

trigonal : 3m, 3m : R3m, R3m

7.BC.10

Beaverite-(Cu)

Pb(Fe3+2Cu)(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Plumbojarosite

PbFe63+(SO4)4(OH)12

trigonal : 3m : R3m

7.BC.10

Ammoniojarosite

NH4Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Argentojarosite

AgFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Beaverite-(Zn)

Pb(Fe3+2Zn)(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Natroalunite-2c

NaAl3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Schlossmacherite

(H3O,Ca)Al3(AsO4,SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Hydronium jarosite

(H3O)Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BC.10

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Natroalunite-1c

Na2Al3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-010

Alunite

KAl3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-020

Ammonioalunite

NH4Al3(SO4)2(OH)6

trigonal : 3m, 3m : R3m, R3m

VI/B.11-030

Huangite

Ca0.5Al3[(OH)6|(SO4)2]

trigonal : 3m : R3m

VI/B.11-043

Walthierite

Ba0.5Al3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-045

Natrojarosite

NaFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-050

Jarosite

KFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-060

Dorallcharite

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

trigonal : 3m : R3m

VI/B.11-065

Ammoniojarosite

NH4Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-070

Hydronium jarosite

(H3O)Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-080

Argentojarosite

AgFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-090

Plumbojarosite

PbFe63+(SO4)4(OH)12

trigonal : 3m : R3m

VI/B.11-100

Osarizawaite

Pb(Al2Cu2+)(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-110

Beaverite-(Zn)

Pb(Fe3+2Zn)(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-115

Beaverite-(Cu)

Pb(Fe3+2Cu)(SO4)2(OH)6

trigonal : 3m : R3m

VI/B.11-120

Krivovichevite

Pb3[Al(OH)6](SO4)(OH)

trigonal : 3m : R3c

VI/B.11-130

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Natroalunite-1c

Na2Al3(SO4)2(OH)6

trigonal : 3m : R3m

7.BB.100

Alunite

KAl3(SO4)2(OH)6

trigonal : 3m : R3m

7.BB.110

Natrojarosite

NaFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BB.140

Jarosite

KFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BB.145

Argentojarosite

AgFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

7.BB.160

Dorallcharite

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

trigonal : 3m : R3m

7.BB.170

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Lanarkite

Pb2(SO4)O

monoklin : 2/m : C2/m

30.02.01.01

Dolerophanite

Cu2(SO4)O

monoklin : 2/m : C2/m

30.02.02.01

Linarite

PbCu(SO4)(OH)2

monoklin : 2/m : P21/m

30.02.03.01

Alunite

KAl3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.01

Natroalunite-1c

Na2Al3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.02

Schlossmacherite

(H3O,Ca)Al3(AsO4,SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.03

Osarizawaite

Pb(Al2Cu2+)(SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.04

Natroalunite-2c

NaAl3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.05

Ammonioalunite

NH4Al3(SO4)2(OH)6

trigonal : 3m, 3m : R3m, R3m

30.02.04.06

Walthierite

Ba0.5Al3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.04.07

Huangite

Ca0.5Al3[(OH)6|(SO4)2]

trigonal : 3m : R3m

30.02.04.08

Jarosite

KFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.01

Natrojarosite

NaFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.02

Hydronium jarosite

(H3O)Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.03

Ammoniojarosite

NH4Fe3+3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.04

Argentojarosite

AgFe3+3(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.05

Plumbojarosite

PbFe63+(SO4)4(OH)12

trigonal : 3m : R3m

30.02.05.06

Beaverite-(Cu)

Pb(Fe3+2Cu)(SO4)2(OH)6

trigonal : 3m : R3m

30.02.05.07

Dorallcharite

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

trigonal : 3m : R3m

30.02.05.08

Itoite

Pb3GeO2(SO4)2(OH)2

orthorhombisch : mmm : Pnma

30.02.06.01

Piypite

K4Cu4O2(SO4)4·(Na,Cu)Cl

tetragonal : 4 : I4

30.02.07.01

Kamchatkite

KCu32+OCl(SO4)2

orthorhombisch : mm2 : Pna21

30.02.08.01

Cannonite

Bi2O(SO4)(OH)2

monoklin : 2/m : P21/c

30.02.09.01

Other languages

German

Natroalunit-1c

Spanish

Natroalunita

French

Natroalunite

English

Natroalunite-1c

Russian

Натроалунит

Simplified Chinese

钠明矾石

Alternative Name

Spanish

Alkanasul

German

Almeriit

Spanish

Almeriita

English

Almeriite

Alumian

German

Alumianit

Spanish

Alumianita

Alumianite

German

Natroalunit

Soda-Alunite

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