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Alum-(Na)

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Wayne Co., Utah, USA
© Rockpick Legend Co.




Formula:
NaAl(SO
 
4
)
 
2
· 12H
 
2
O
Colour:ColourlessHardness:3
Member of:Alum Group
Name:The name reflects its sodium content and alum, a hydrous aluminium sulfate.

Classification of Alum-(Na)

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/C.14-10
Nickel-Strunz 10th (pending) edition ID:7.CC.20

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:29.5.5.2

29 : HYDRATED ACID AND NORMAL SULFATES
5 : AB(XO4)2·xH2O
Hey's CIM Ref.:25.6.14

25 : Sulphates
6 : Sulphates of Al and Tl
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Physical Properties of Alum-(Na)

Lustre:Vitreous
Colour:Colourless
Hardness (Mohs):3

Chemical Properties of Alum-(Na)

Formula:
NaAl(SO
 
4
)
 
2
· 12H
 
2
O
Simplified for copy/paste:NaAl(SO4)2·12H2O
Essential elements:Al, H, Na, O, S
All elements listed in formula:Al, H, Na, O, S

Relationship of Alum-(Na) to other Species

Member of:Alum Group
Other Members of Group:

- +
Alum-(K)
KAl(SO
 
4
)
 
2
· 12H
 
2
O
Lanmuchangite
Tl
+
 
Al(SO
 
4
)
 
2
· 12H
 
2
O
Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
· 12H
 
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.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.25Ammoniomagnesiovoltaite
(NH
 
4
)
 
2
Mg
2+
5
Fe
3+
3
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
· 15H
 
2
O
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 (?)
Related Minerals - Hey's Index Grouping:

- +
25.6.1Rostite
Al(SO
 
4
)(OH) · 5H
 
2
O
25.6.2Jurbanite
Al(SO
 
4
)(OH) · 5H
 
2
O
25.6.3Khademite
Al(SO
 
4
)F · 5H
 
2
O
25.6.4Meta-aluminite
Al
 
2
(SO
 
4
)(OH)
 
4
· 5H
 
2
O
25.6.5Aluminite
Al
 
2
(SO
 
4
)(OH)
 
4
· 7H
 
2
O
25.6.6Meta-alunogen
Al
 
2
(SO
 
4
)
 
3
· 12H
 
2
O
25.6.7Alunogen
Al
 
2
(SO
 
4
)
 
3
· 17H
 
2
O
25.6.8Felsőbányaite
Al
 
4
(SO
 
4
)(OH)
 
10
· 4H
 
2
O
25.6.9Basaluminite
25.6.10Hydrobasaluminite
Al
 
4
(SO
 
4
)(OH)
 
10
· 12-36H
 
2
O
25.6.11Zaherite
Al
 
12
(SO
 
4
)
 
5
(OH)
 
26
· 20H
 
2
O
25.6.12Tamarugite
NaAl(SO
 
4
)
 
2
· 6H
 
2
O
25.6.13Mendozite
NaAl(SO
 
4
)
 
2
· 11H
 
2
O
25.6.15Natroalunite
(Na,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.16Kalinite
KAl(SO
 
4
)
 
2
· 11H
 
2
O Not confirmed
25.6.17Alum-(K)
KAl(SO
 
4
)
 
2
· 12H
 
2
O
25.6.18Alunite
KAl
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.19Natroalunite-2c
(Na,Ca
 
0.5
,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.6.20Tschermigite
(NH
 
4
)Al(SO
 
4
)
 
2
· 12H
 
2
O

Other Names for Alum-(Na)

Synonyms:
Na AlumSodalumiteSodium Alum
Other Languages:
German:Sodalumit
Russian:Алюминиево-натриевые квасцы
Spanish:Sodalumita

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 Alum-(Na)

Reference List:

- +
Acta Crystallographica (1967): 22: 182.

Internet Links for Alum-(Na)

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sodium Alum details from Handbook of Mineralogy (PDF)
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  • Localities for Alum-(Na)

    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.
    (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.
    Germany
     
    • Lower Saxony
      • Harz
        • Lautenthal
    No reference listed
    • Thuringia
      • Saalfeld
        • Hockeroda
    Van King
    Guatemala
     
    • Quetzaltenango Department
      • El Palmar
        • Santiaguito Dome (Santiaguito Volcano)
    www.excaliburmineral.com/
    Hungary
     
    • Nógrád Co.
      • Mátra Mtns
        • Bátonyterenye
    ACTA MIN. PETR. Suppl. Tomus XXXVIII., 1997
    USA
     
    • Arizona
      • Coconino Co.
        • San Franciscan volcanic field (San Francisco Peaks; San Francisco Mts)
    Hanson, S. L., A. U. Fastner, W. B. Simmons (2008) Mineralogy of the Fumerole deposits at Sunset Crater Volcano National Monument, Northern Arizona. Rocks & Mnerals 83:6 pp 534-544.
      • Santa Cruz Co.
        • Patagonia Mts
          • Harshaw District
            • Alum Gulch
              • Flux Gulch
    RRUFF database- specimen I.D R110204
      • Swain Co.
    Mineralogical Record March - April 2000
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