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Ammoniomagnesiovoltaite

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Pécs-Vasas, Pécs, Mecsek Mts., Baranya Co., Hungary
© Vincent Bourgoin

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Formula:
(NH
 
4
)
 
2
Mg
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
System:Isometric
Member of:Voltaite Group
Name:The root species name, Voltaite, is named after Count Alessandro Giuseppe Antonio Anastasio Volta (1745-1827), Italian physicist and pioneer in electricity. The prefix "Ammoniomagnesio" alludes to the components of ammonium and magnesium substituting for potassium and ferrous iron in voltaite.


Voltaite Group.
Ammonium-magnesium-analogue of voltaite.

Classification of Ammoniomagnesiovoltaite

IMA status:Approved 2009
Nickel-Strunz 10th (pending) edition ID:7.CC.25

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
Dana 8th edition ID:29.9.1.4

29 : HYDRATED ACID AND NORMAL SULFATES
9 : Miscellaneous
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Type Occurrence of Ammoniomagnesiovoltaite

Type Locality:Pécs-Vasas, Pécs, Mecsek Mts., Baranya Co., Hungary

Crystallography of Ammoniomagnesiovoltaite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3c {F41/d 3 2/c}
Cell Parameters:a = 27.351(3) Å
Unit Cell Volume:V 20,460.66 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
6.85 (24)
5.59 (100)
3.562 (66)
3.420 (72)
3.059 (22)
2.197 (22)
1.784 (25)
1.558 (25)

Chemical Properties of Ammoniomagnesiovoltaite

Formula:
(NH
 
4
)
 
2
Mg
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
Essential elements:Al, Fe, H, Mg, N, O, S
All elements listed in formula:Al, Fe, H, Mg, N, O, S

Relationship of Ammoniomagnesiovoltaite to other Species

Member of:Voltaite Group
Other Members of Group:

- +
Pertlikite
K
 
2
(Fe
2+
 
,Mg)
 
2
Mg
 
4
Fe
3+
2
Al(SO
 
4
)
 
12
 · 18H
 
2
O
Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
7.CC.05Krausite
KFe(SO
 
4
)
 
2
 · H
 
2
O
7.CC.10Tamarugite
NaAl(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.15Kalinite
KAl(SO
 
4
)
 
2
 · 11H
 
2
O Not confirmed
7.CC.15Mendozite
NaAl(SO
 
4
)
 
2
 · 11H
 
2
O
7.CC.20Lonecreekite
(NH
 
4
)Fe
3+
 
(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(K)
KAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Alum-(Na)
NaAl(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.20Lanmuchangite
Tl
+
 
Al(SO
 
4
)
 
2
 · 12H
 
2
O
7.CC.25Voltaite
K
 
2
Fe
2+
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Zincovoltaite
K
 
2
Zn
 
5
Fe
3+
3
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.25Pertlikite
K
 
2
(Fe
2+
 
,Mg)
 
2
Mg
 
4
Fe
3+
2
Al(SO
 
4
)
 
12
 · 18H
 
2
O
7.CC.30Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
 · 2H
 
2
O
7.CC.35Ferrinatrite
Na
 
3
Fe(SO
 
4
)
 
3
 · 3H
 
2
O
7.CC.40Goldichite
KFe(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.45Löweite
Na
 
12
Mg
 
7
(SO
 
4
)
 
13
7.CC.50Blödite
Na
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Nickelblödite
Na
 
2
(Ni,Mg)(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Changoite
Na
 
2
Zn(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.50Zincblödite
7.CC.55Leonite
K
 
2
Mg(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.55Mereiterite
K
 
2
Fe(SO
 
4
)
 
2
 · 4H
 
2
O
7.CC.60Boussingaultite
(NH
 
4
)
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Cyanochroite
K
 
2
Cu(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Mohrite
(NH
 
4
)
 
2
Fe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Nickelboussingaultite
(NH
 
4
)
 
2
Ni(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.60Picromerite
K
 
2
Mg(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.65Polyhalite
K
 
2
Ca
 
2
Mg(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.70Leightonite
K
 
2
Ca
 
2
Cu(SO
 
4
)
 
4
 · 2H
 
2
O
7.CC.75Amarillite
NaFe(SO
 
4
)
 
2
 · 6H
 
2
O
7.CC.80Konyaite
Na
 
2
Mg(SO
 
4
)
 
2
 · 5H
 
2
O
7.CC.85Wattevilleite
Na
 
2
Ca(SO
 
4
)
 
2
 · 4H
 
2
O (?)

Other Names for Ammoniomagnesiovoltaite

Synonyms:
IMA2009-040
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ammoniomagnesiovoltaite

Reference List:

- +
IMA Approvals - September 2009

Internet Links for Ammoniomagnesiovoltaite

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    • Localities for Ammoniomagnesiovoltaite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Hungary
     
    • Baranya Co.
      • Mecsek Mts.
        • Pécs
    		GEODA 2010/1
    Mineral and/or Locality
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