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Huangite

Additional Functions

Collectors Summary

Color weiß, gelblich
Streak color weiß
Cleavages vollkommen {001}
Fracture nicht genannt
Crystal System trigonal, R3m

Chemism

Chemical formula

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

Chemical composition

Aluminium, Calcium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 395.1545166 u; Number of atoms in the formula: 25.5

Info

Empirical formula:

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

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.53

6

23.53

1.0079470

6.0476820

Oxygen

O

56.68

14

54.90

15.9994300

223.9920200

Aluminium

Al

20.48

3

11.76

26.9815382

80.9446146

Sulfur

S

16.23

2

7.84

32.0655000

64.1310000

Calcium

Ca

5.07

0.5

1.96

40.0784000

20.0392000

Analysis wt%

Na2O : 0.43, K2O : 0.67, CaO : 6.17, Al2O3 : 38.62, SO3 : 38.62, H2O : 13.60 (Ref: American Mineralogist 92)

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.11-043

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

Classification by Hölzel

7.BB.300

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
B: Sulfates (+Anions -Water)
B: Alunite-Group (sulfatian)
3: Alunites with Ca, Sr, Ba

Dana 8th edition

30.02.04.08

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

Optical Properties

Color

weiß, gelblich

Streak color

weiß

Diaphaneity (Transparency)

transparent

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

6.983

Cell parameters b (Å)

-

Cell parameters c (Å)

33.517

Cell parameters a/b or c/a

4.800

Cell parameters c/b

-

Z

6

Volume (ų)

1415.402

X-Ray Powder Diffraction

4.91(70),
3.49(30),
2.97(100),
2.455(30),
2.231(50),
1.899(40),
1.745(40),
1.375(40)

XRD chart Huangite

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

Physical Properties

Density (g/cm³)

2.80 (berechnet)

2.781 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

Fracture

nicht genannt

Preface

Author (Name, Year)

Li & Peacor & Essene & Brosnahan & Beane, 1992

References

American Mineralogist 77 (1992), 1275

Other languages

German

Huangit

Spanish

Huangita

French

Huangite

English

Huangite

Russian

Хуангит

Alternative Name

Italian

Huanguita

CNMNC (IMA)-Number

IMA 1991-009

CNMNC symbol

Symbol

Hua

IDs

GUSID (Global unique identifier short form) 3jflw9W-S0u5EYqt2wgPGg
GUID (Global unique identifier) C3E537DE-BED5-4B4B-B911-8AADDB080F1A
Database ID 1638