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Magnesiovoltaite

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Magnesiovoltait
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Magnesiovoltait

Mina Alcaparrosa, Cerritos Bayos, Chile. BB 1,0mm

Collection: Mabu
Copyright: Mabu
Contribution: Mabu 2012-09-09
Locality: Alcaparrosa Mine / Cerritos Bayos / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile

Collectors Summary

Color gelb, braun-gelb, blass gelblich-grünlich
Hardness (Mohs) 2.5
Cleavages keine beobachtet
Fracture submuschelig
Crystal System kubisch, Fd3c

Chemism

Chem­ical formula

K2Mg5Fe3+3Al(SO4)12·18H2O

Empir­ical formula (anal­y­sis)

(K1.85Na0.08)(Mg4.25Mn0.46Zn0.14)Fe3+3.14Al0.91(SO4)11.91(H2O)18.325O0.035

Chem­ical com­po­si­tion

Aluminium, Eisen, Magnesium, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 1886.607249382 u; Number of atoms in the formula: 125.39

Info

Empirical formula:

(K1.85Na0.08)(Mg4.25Mn0.46Zn0.14)Fe3.14Al0.91(SO4)11.91(H2O)18.325O0.035

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.96

36.65

29.23

1.0079470

36.9412576

Oxygen

O

55.97

66

52.64

15.9994300

1,055.9623800

Sodium

Na

0.10

0.08

0.06

22.9897702

1.8391816

Magnesium

Mg

5.48

4.25

3.39

24.3050600

103.2965050

Aluminium

Al

1.30

0.91

0.73

26.9815382

24.5531998

Sulfur

S

20.24

11.91

9.50

32.0655000

381.9001050

Potassium

K

3.83

1.85

1.48

39.0983100

72.3318735

Manganese

Mn

1.34

0.46

0.37

54.9380499

25.2715030

Iron

Fe

9.29

3.14

2.50

55.8452000

175.3539280

Zinc

Zn

0.49

0.14

0.11

65.4094000

9.1573160

Anal­y­sis wt%

Na2O : 0.13, K2O : 4.64, MgO : 9.13, MnO : 1.73, ZnO : 0.84, Al2O3 : 2.47, Fe2O3 : 13.36, SO3 : 50.83, H2O : 17.6, Total : 100.73

Strunz 9th edi­tion incl. updates

7.CC.25

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

IMA sta­tus

anerkannt - CNMNC Jan. 2016

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Voltaite group

Optical Properties

Color

gelb, braun-gelb, blass gelblich-grünlich

2V angle

Uniaxial mit ε = 1.584(2) und ω = 1.588(2), Biaxial (-) mit α = 1.584(2), β = 1.

Anisotropism

unnormal anisotropisch

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

228

Space Group

Fd3c

Cell param­e­ters a (Å)

27.161(1)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

16

Volumne (ų)

20037.211

Kristall struc­ture

Struktur bestimmt

X-Ray Pow­der Diffrac­tion

9.56(29),
6.77(37),
5.53(61),
3.532(68),
3.392(100),
3.034(45),
2.845(30),
2.531(24)

XRD chart Magnesiovoltaite

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.5

Density (g/cm³)

2.51(2) (gemessen) 2.506 (berechnet)

2.501 ( ρ calc. Mineralienatlas )

Cleav­ages

keine beobachtet

Frac­ture

submuschelig

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Calama/Cerritos Bayos/Alcaparrosa Mine

Type mate­r­ial

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moskau, Russland

Col­lec­tion number of type mate­r­ial

4780/1 (Holotyp) und 4780/2 (Cotyp)

Par­a­ge­n­e­sis of type mate­r­ial

Coquimbit, Tamarugit, Alum-(Na), Rhomboklas, Yavapaiit, Voltait und Opal, sowie eine andere mit Botryogen, Opal, Tamarugit, Alum-(K), Pickeringit, Magnesiocopiapit und Jarosit

Preface

Author (Name, Year)

Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Möhn, G., Rusakov, V.S., Pekov, I.V., Scholz, R., Eremina, T.A., Belakovskiy, D.I. and Lorenz, J.A. (2016)

References

Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Möhn, G., Rusakov, V.S., Pekov, I.V., Scholz, R., Eremina, T.A., Belakovskiy, D.I. and Lorenz, J.A. (2016) Magnesiovoltaite, IMA 2015-095. CNMNC Newsletter No. 29, February 2016, page 203; Mineralogical Magazine, 80, 199–205

Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Möhn, G., Rusakov, V.S., Pekov, I.V., Scholz, R., Eremina, T.A., Belakovskiy, D.I. and Lorenz, J.A. - Magnesiovoltaite, K2Mg5Fe3+3Al(SO4)12·18H2O, a new mineral from the Alcaparrosa mine, Antofagasta region, Chile - European Journal of Mineralogy (Appeared or available online: 14. Juni 2016)

IMA group assignments

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

Voltaite

K2Fe2+5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Pertlikite

K2(Fe2+,Mg)2(Mg,Fe3+)4Fe3+2Al(SO4)12·18H2O

tetragonal : 4mm : I41cd

7.CC.25

Ammoniomagnesiovoltaite

(NH4)2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Zincovoltaite

K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Ammoniovoltaite

(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18

kubisch : m3m : Fd3c

7.CC.25

Magnesiovoltaite

K2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CC.25

Other languages

German

Magnesiovoltait

English

Magnesiovoltaite

Russian

Магнезиовольтаит

IMA Number

IMA 2015-095

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

German pages

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Russian pages

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