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Caichengyunite

Additional Functions

Collectors Summary

Color gräulich-weiß
Hardness (Mohs) 1.5 - 2.0
Solubility +++ H2O
Crystal System monoklin,
Morphology faserige Kristalle

Chemism

Chem­ical formula

(Fe2+)3Al2(SO4)6·30 H2O

Addi­tional chem. informa­tion

Wasserhaltiges Sulfat.

Chem­ical com­po­si­tion

Aluminium, Eisen, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1338.3377164 u; Number of atoms in the formula: 125

Info

Empirical formula:

(Fe)3Al2(SO4)6·30H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

4.52

60

48.00

1.0079470

60.4768200

Oxygen

O

64.56

54

43.20

15.9994300

863.9692200

Aluminium

Al

4.03

2

1.60

26.9815382

53.9630764

Sulfur

S

14.38

6

4.80

32.0655000

192.3930000

Iron

Fe

12.52

3

2.40

55.8452000

167.5356000

Anal­y­sis wt%

SO3 : 33.96, Al2O3 : 7.90, FeO : 16.15, H2O : 41.20 (Ref: J.Centr.SouthUniv.Technol.2002)

Strunz 9th edi­tion incl. updates

7.CB.95

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
B: Mit ausschließlich mittelgroßen Kationen
95:

Lapis Clas­sifica­tion

VI/C.12-070

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
12: Mittelgroße und sehr große Kationen; Halotrichit-Gruppe

Clas­sifica­tion by Hölzel

7.CC.500

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
C: Alunogen-Group

IMA sta­tus

Veröffentlicht ohne Prüfung durch die CNMNC

Min­eral sta­tus

Mineralstatus fragwürdig

Optical Properties

Color

gräulich-weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.005

Birefringence chart\! Caichengyunite title=Birefringence chart Caichengyunite

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

1.476

RI value β

1.478

RI value γ / ε

1.481

Ri mean

1.478

2V angle

Biaxial (+) nd

Crystallography

Crystal Sys­tem

monoklin

Cell param­e­ters a (Å)

7.63

Cell param­e­ters b (Å)

24.13

Cell param­e­ters c (Å)

22.64

Cell param­e­ters a/b or c/a

0.316

Cell param­e­ters c/b

0.938

Cell param­e­ters α

90°

Cell param­e­ters β

111.7

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

3872.897

X-Ray Pow­der Diffrac­tion

6.494(10),
4.886(100),
3.776(20),
3.504(10),
3.252(10),
3.030(10),
2.727(10),
1.863(10)

XRD chart Caichengyunite

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

Morphol­ogy

faserige Kristalle

Physical Properties

Hard­ness (Mohs)

1.5 - 2.0

VHN (Hard­ness Vick­ers)

24 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.20 (gemessen)

2.295 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

Preface

Author (Name, Year)

Zhang,R., Zhang,Y., Hong,Z., Mao,Z., Liu,F. & Xi,J. (2002). Caichengyu

References

American. Mineral. 89 (2004), 894.

Baumgärtl,U. & Mücke,A. (2004). Neue von der IMA anerkannte Mineralien - eine Kurzfassung (XXVII). Der Aufschluss, Jg.55, Nr.5, S.NM 193-200.

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

'Caichengyunite'

(Fe2+)3Al2(SO4)6·30 H2O

7.CB.95

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

Pickeringite

MgAl2(SO4)4·22H2O

monoklin : 2/m : P21/c

VI/C.12-010

Wupatkiite

(Co,Mg)Al2[SO4]4·22H2O

monoklin : 2/m : P21/c

VI/C.12-012

Halotrichite

Fe2+Al2(SO4)4·22H2O

monoklin : 2/m : P21/c

VI/C.12-020

Apjohnite

MnAl2(SO4)4·22H2O

monoklin : 2/m : P21/c

VI/C.12-030

Dietrichite

(Zn,Fe2+,Mn)Al2(SO4)4·22H2O

monoklin : 2/m : P21/c

VI/C.12-040

'Redingtonite'

(Fe2+,Mg,Ni)(Cr,Al)2(SO4)4·22H2O

VI/C.12-050

Bílinite

Fe2+Fe23+(SO4)4·22H2O

monoklin : 2/m : P21/c

VI/C.12-060

'Caichengyunite'

(Fe2+)3Al2(SO4)6·30 H2O

VI/C.12-070

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

'Caichengyunite'

(Fe2+)3Al2(SO4)6·30 H2O

7.CC.500

Omongwaite

Na2Ca5(SO4)6·3H2O

monoklin : 2 : C2

7.CC.555

Other languages

German

Caichengyunit

Spanish

Caichengyunita

English

Caichengyunite

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

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