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Voltaite

Pictures (14 Images total)

Voltait
Views (Image: 1246097374): 2941
Voltait

Bildbreite: 0,8 mm; Fundort: Rio Tinto Bergbaugebiet, Huelva, Andalusien, Spanien

Copyright: Christian Rewitzer
Contribution: Hg 2009-06-27
Locality: Minas de Riotinto / Cuenca Minera / Huelva, Provinz / Andalusien (Andalucía) / Spanien
Oktaedrischer Voltait mit Halotrichit
Views (Image: 1574931970): 677
Oktaedrischer Voltait mit Halotrichit (SNr: A042098)

Deutschland/Nordrhein-Westfalen/Arnsberg, Bezirk/Olpe, Kreis/Lennestadt/Meggen, BB = 9,5 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2019-11-28
Locality: Meggen / Lennestadt / Olpe, Kreis / Arnsberg, Bezirk / Nordrhein-Westfalen / Deutschland
Voltait
Views (Image: 1146079866): 1145
Voltait

Voltait, Fundort: Halde Anna 1, Alsdorf

Copyright: Maurice de Graaf
Contribution: bardenoki 2006-04-26
Locality: Anna / Alsdorf / Aachen, Städteregion / Köln, Bezirk / Nordrhein-Westfalen / Deutschland
Halotrichit auf Voltait
Views (Image: 1196588120): 1735
Halotrichit auf Voltait

Fundort: Rio Tinto Bergbaugebiet, Huelva, Andalusien, Spanien

Collection: Alan Goldstein
Copyright: Alan Goldstein
Contribution: Stefan 2007-12-02
Locality: Minas de Riotinto / Cuenca Minera / Huelva, Provinz / Andalusien (Andalucía) / Spanien
Voltait
Views (Image: 1271590119): 1371
Voltait

Bildbreite: 2 mm, Fundort: Alcaparrosa Mine, Cerritos Bayos, Calama, Provinz Antofagasta, Chile.

Copyright: Luigi Chiappino
Contribution: thdun5 2010-04-18
Locality: Alcaparrosa Mine / Cerritos Bayos / Calama / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Voltait
Views (Image: 1178814007): 1729
Voltait

Bildbreite: 2 mm; Fundort: Grube Clara, Wolfach, Schwarzwald

Copyright: Stephan Wolfsried
Contribution: Hg 2007-05-10
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color grünlich schwarz, dunkelgrün, olivgrün, schwarz
Streak color graulich grün
Hardness (Mohs) 2
Solubility +++ H2O
Crystal System kubisch, Fd3c
Morphology kubisch

Chemism

Chem­ical formula

K2Fe2+5Fe3+3Al(SO4)12·18H2O

Chem­ical com­po­si­tion

Aluminium, Eisen, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 2028.9742302 u; Number of atoms in the formula: 125

Info

Empirical formula:

K2Fe5Fe3Al(SO4)12·18H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.79

36

28.80

1.0079470

36.2860920

Oxygen

O

52.04

66

52.80

15.9994300

1,055.9623800

Aluminium

Al

1.33

1

0.80

26.9815382

26.9815382

Sulfur

S

18.96

12

9.60

32.0655000

384.7860000

Potassium

K

3.85

2

1.60

39.0983100

78.1966200

Iron

Fe

22.02

8

6.40

55.8452000

446.7616000

Anal­y­sis wt%

K2O : 4.73,
Na2O : 0.50,
MgO : 0.48,
FeO : 14.07,
Al2O3 : 1.58,
Fe2O3 : 13.47,
SO3 : 46.78,
H2O : 16.44,
ZnO : 1.69,
CuO : 0.55
(Ref: Dana, 7th ed. 2)

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

Lapis Clas­sifica­tion

VI/C.14-050

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
14: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.CD.600

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
D: Sulfates, C medium + large
6: Voltaite-Group

Dana 8th edi­tion

29.09.01.01

29: Hydrated Acid and Sulfates
09: Hydrated Acid and Sulfates with miscellaneous formulae
01: Voltaite Group

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Voltaite group

Optical Properties

Color

grünlich schwarz, dunkelgrün, olivgrün, schwarz

Streak color

graulich grün

Diaphane­ity (Trans­parency)

opak

RI value α / ω / n

1.600

Ri mean

1.600

2V angle

Isotropisch

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

228

Space Group

Fd3c

Cell param­e­ters a (Å)

27.38

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)

20525.811

X-Ray Pow­der Diffrac­tion

5.434(20),
4.741(40),
4.247(50),
3.736(20),
3.504(20),
3.464(30),
3.373(60),
3.312(100)

XRD chart Voltaite

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

Morphol­ogy

kubisch

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2

VHN (Hard­ness Vick­ers)

83 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.6 - 2.8 / Durchschnittlich = 2.7

2.626 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ H2O

Preface

Name from

Alessandro Volta, dem italienischen Physiker und einer der Begründer der Elektrizitätslehre.

Author (Name, Year)

Arcangelo Scacchi, 1841

External links

Szakáll S, Sajó I, Fehér B, Bigi S, (2012) Ammoniomagnesiovoltaite, a new voltaite-related mineral species from Pécs-Vasas, Hungary, The Canadian Mineralogist, 50, 65-72
Grice J D, Ferraris G (2003) New minerals approved in 2002 and nomenclature modifications approved in 1998-2002 by the Commission on the New Minerals and Mineral Names, International Mineralogical Association, The Canadian Mineralogist, 41, 795-802
Bariand P, Cesbron F, Berthelon J-P (1977) Les sulfates de fer de Saghand près de Yazd (Iran), Mémoire Hors-Série de la Société Géologique de France, 8, 77-85
Blaas J (1883) Beiträge zur Kenntniss natürlicher wasserhaltiger Doppelsulfate, Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften, 87, 141-163
Scacchi A (1841) Della Voltaite, nouva specie di minerale trovata nella solfatara di Pozzuoli, 1, in Antologia di Scienze Naturali R. Piria Napoli 67-71
Breislak S (1792) Sulfate d alumine & de fer, in Essais Mineralogiques sur la Solfatare de Pouzzole Chez Janvier Giaccio Naples 148-158

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 741

Mereiter K (1972) Die kristallstruktur des voltaits, K2Fe52+Fe33+Al[SO4]12·18H2O, Tschermaks Mineralogische und Petrographische Mitteilungen, 18, 185-202

Sabron P, Alpers C N (2013) Raman spectroscopy of efflorescent sulfate salts from Iron Mountain Mine Superfund Site, California, Astrobiology, 13, 270-278

Rossi M, Rizzi R, Vergara A, Capitelli F, Altomare A, Bellatreccia F, Saviano M, Ghiara R M (2017) Compositional variation of turquoise-group minerals from the historical collection of the Real Museo Mineralogico of the University of Naples, Mineralogical Magazine, 81, 1405-1429

Košek F, Edwards H G M, Jehlička J (2019) Raman spectroscopic vibrational analysis of the complex iron sulfates clairite, metavoltine, and voltaite from the burning coal dump Anna I, Alsdorf, Germany, Journal of Raman Spectroscopy, 50, 1-8

American Mineralogist 105 (2020), 1088

Antologia di Scienze Naturali di Napoli1 (1841), 67

IMA group assignments


 
 
(NH4)2Mg5Fe3+3Al(SO4)12·18H2O
kubisch
Fd3c

 
 
(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18
kubisch
Fd3c

 
 
K2Mg5Fe3+3Al(SO4)12·18H2O
kubisch
Fd3c

 
 
K2(Fe2+,Mg)2(Mg,Fe3+)4Fe3+2Al(SO4)12·18H2O
tetragonal
I41cd

 
 
K2Fe2+5Fe3+3Al(SO4)12·18H2O
kubisch
Fd3c

 
 
K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O
kubisch
Fd3c

Refresh list

Actuality: 02. Mar 2021 - 06:19:27

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

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

Alum-(Na)

NaAl(SO4)2·12H2O

kubisch : m3 : Pa3

VI/C.14-010

Alum-(K)

KAl(SO4)2·12H2O

kubisch : m3 : Pa3

VI/C.14-020

Tschermigite

(NH4)Al(SO4)2·12H2O

kubisch : m3 : Pa3

VI/C.14-030

Lonecreekite

(NH4)(Fe3+,Al)(SO4)2·12H2O

kubisch : m3 : Pa3

VI/C.14-040

Lanmuchangite

TlAl[SO4]2·12H2O

kubisch : m3 : Pa3

VI/C.14-045

Pertlikite

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

tetragonal : 4mm : I41cd

VI/C.14-048

Voltaite

K2Fe2+5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

VI/C.14-050

Zincovoltaite

K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O

kubisch : m3m : Fd3c

VI/C.14-060

Ammoniomagnesiovoltaite

(NH4)2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

VI/C.14-070

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

Voltaite

K2Fe2+5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CD.600

Pertlikite

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

tetragonal : 4mm : I41cd

7.CD.605

Ammoniomagnesiovoltaite

(NH4)2Mg5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CD.607

Zincovoltaite

K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O

kubisch : m3m : Fd3c

7.CD.610

Metavoltine

K2Na6Fe2+Fe63+(SO4)12O2·18 H2O

trigonal : 3 : P3

7.CD.620

Löweite

Na12Mg7(SO4)13·15H2O

trigonal : 3 : R3

7.CD.640

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

Voltaite

K2Fe2+5Fe3+3Al(SO4)12·18H2O

kubisch : m3m : Fd3c

29.09.01.01

Zincovoltaite

K2(Zn,Fe2+,Mn)5Fe33+Al(SO4)12·18H2O

kubisch : m3m : Fd3c

29.09.01.02

Zircophyllite

K2NaFe2+7Zr2(Si4O12)2O2(OH)4F

triklin : 1 : P1

29.09.02.01

Bazhenovite

Ca8S5(S2O3)(OH)12·20H2O

monoklin : 2/m : P21/c

29.09.03.01

Other languages

German

Voltait

English

Voltaite

French

Voltaite

Spanish

Voltaíta

Russian

Вольтаит

Simplified Chinese

绿钾铁矾

Japanese

モンスメダイト

Alternative Name

Italian

Monsmedita

Monsmedite

Pettkoite

Simplified Chinese

水钾铊矾

Japanese

ボルタ石

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

German pages

DeWikiPedia - search for: Voltait
Google-Bilder-Suche - search for: Voltait
Mineralogisch-Petrographisches-Institut Hamburg - search for: Voltait

English pages

Mindat - search for: Voltaite
Webmineral - search for:Voltaite
Handbook-of-Mineralogy - search for: Voltaite
RRUFF - Raman, XRD and other mineral data - search for: Voltaite
RRUFF - References and PDF downloads - search for: Voltaite
American-Mineralogist-Crystal-Structure-Database - search for: Voltaite
Athena - search for: Voltaite

Russian pages

Webmineral.ru - search for: Вольтаит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Voltait
Crystal-Treasure.com - search for: Voltait
Bosse - search for: Voltait

Locations with GPS information