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Nikischerite (Nikischerit)

Additional Functions

Collectors Summary

Color grün
Streak color gelb weiß
Hardness (Mohs) 2
Cleavages {0001} vollkommen, {0001} gut
Crystal System trigonal, R3

Chemism

Chemical formula

NaFe62+Al3[(OH)18|(SO4)2]·12H2O

Chemical composition

Aluminium, Eisen, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1153.4486988 u; Number of atoms in the formula: 92

Info

Empirical formula:

NaFe6Al3[(OH)18(SO4)2]·12H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.67

42

45.65

1.0079470

42.3337740

Oxygen

O

52.71

38

41.30

15.9994300

607.9783400

Sodium

Na

1.99

1

1.09

22.9897702

22.9897702

Aluminium

Al

7.02

3

3.26

26.9815382

80.9446146

Sulfur

S

5.56

2

2.17

32.0655000

64.1310000

Iron

Fe

29.05

6

6.52

55.8452000

335.0712000

Analysis wt%

SO3 : 13.88, Al2O3 : 13.26, FeO : 37.37, Na2O : 2.69, H2O : 32.80 (Ref: berechnet)

Strunz 9th edition incl. updates

7.DD.35

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
D: Sulfate (Selenate, etc.) mit weitere Anionen, mit H2O
D: mit mittelgroßen Kationen; Lagen von kantenverknüpften Oktaedern
35:Woodwardit-Gruppe

Lapis Classification

VI/D.14-022

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
D: Wasserhaltige Sulfate, mit fremden Anionen
14: Mittelgroße und sehr große Kationen

Classification by Hölzel

7.DD.275

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
D: Sulfates (+Anions +Water)
D: Sulfate-Hydrotalcites

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Hydrotalcite Supergroup  ⇒ Wermlandit-Gruppe

Optical Properties

Color

grün

Streak color

gelb weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

RI value α / ω / n

1.560

Ri mean

1.560~

2V angle

Uniaxial (-)

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

9.347

Cell parameters b (Å)

-

Cell parameters c (Å)

33.000

Cell parameters a/b or c/a

3.531

Cell parameters c/b

-

Z

3

Volume (ų)

2496.83

X-Ray Powder Diffraction

11.0(100),
5.54(60),
4.311(20),
3.674(50),
2.624(20),
2.425(30),
2.176(20),
1.932(30)

XRD chart Nikischerite

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)

2

Density (g/cm³)

2.32

2.301 ( ρ calc. Mineralienatlas )

Cleavages

{0001} vollkommen, {0001} gut

Preface

Author (Name, Year)

Huminicki & Hawthorne & Grice & Roberts & Jambor, 2003

References

Mineralogical Record 34 (2003), 155

IMA group assignments



 
 
 
[Mg18Al9(OH)54][Sr2(CO3,PO4)9(H2O,H3O)11]
trigonal
 

 
 
 
Mg6Al3(OH)18[Na(H2O)6](SO4)2·6H2O
trigonal
R3m

 
 
 
NaZn5Al3[(OH)16|(SO4)2]·6H2O
trigonal
P3

 
 
 
NaFe62+Al3[(OH)18|(SO4)2]·12H2O
trigonal
R3

 
 
 
NaMn62+Al3[(OH)18|(SO4)2]·12H2O
trigonal
R3

 
 
 
(Ca,Mg)Mg7(Al,Fe3+)2(SO4)2(OH)18·12H2O
trigonal
P3c1

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Actuality: 26. Mar 2024 - 03:54:33

Other languages

German

Nikischerit

Spanish

Nikischerita

French

Nikischerite

English

Nikischerite

Russian

Никишерит

Simplified Chinese

羟铝钠铁矾

Traditional Chinese

羥鋁鈉鐵礬

Alternative Name

German

Mamaniit

Nach dem Erstfinder des Minerals

English

Mamaniite

Name from the person who found this mineral first - Gregorio Mamani.

CNMNC (IMA)-Number

IMA 2001-039

CNMNC symbol

Symbol

Nik

IDs

GUSID (Global unique identifier short form) wpKvy2BD3UCpl3e5hvYdCA
GUID (Global unique identifier) CBAF92C2-4360-40DD-A997-77B986F61D08
Database ID 2754