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Alum-(Na)

Formula:
NaAl[SO
 
4
]
 
2
 · 12H
 
2
O
Colour:ColourlessHardness:3
Name:The name reflects its sodium content and alum, a hydrous aluminium sulfate.


Alum Group.

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
Essential elements:Al, H, Na, O, S
All elements listed in formula:Al, H, Na, O, S

Relationship of Alum-(Na) to other Species

Related to:
  • Alum Group
    • 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
    		·4H
     
    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 (?)
    Related Minerals - Hey's Index Grouping:

    - +
    25.6.1Rostite
    Al[OH|SO
     
    4
    		] · 5H
     
    2
    		O
    25.6.2Jurbanite
    Al[OH|SO
     
    4
    		] · 5H
     
    2
    		O
    25.6.3Khademite
    Al[F|SO
     
    4
    		] · 5H
     
    2
    		O
    25.6.4Meta-aluminite
    Al
     
    2
    		[(OH)
     
    4
    		|SO
     
    4
    		] · 5H
     
    2
    		O
    25.6.5Aluminite
    Al
     
    2
    		[(OH)
     
    4
    		|SO
     
    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
    		[(OH)
     
    10
    		|SO
     
    4
    		] · 4H
     
    2
    		O
    25.6.9Basaluminite
    25.6.10Hydrobasaluminite
    Al
     
    4
    		[(OH)
     
    10
    		|SO
     
    4
    		] · 12-36H
     
    2
    		O
    25.6.11Zaherite
    Al
     
    12
    		[(OH)
     
    26
    		|(SO
     
    4
    		)
     
    5
    		] · 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
    		[(OH)
     
    3
    		|SO
     
    4
    		]
     
    2
    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
    		[(OH)
     
    3
    		|SO
     
    4
    		]
     
    2
    25.6.19Minamiite
    (Na,Ca
     
    0.5
    		,K)Al
     
    3
    		[(OH)
     
    3
    		|SO
     
    4
    		]
     
    2
    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
  • Search for Alum-(Na) in the Natural History Museum (London) online catalogue
  • Sodium Alum details from Handbook of Mineralogy (PDF)
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    Localities for Alum-(Na)

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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.
    Germany
     
    • Lower Saxony
      • Harz Mts
        • Lautenthal
    		No reference listed
    Guatemala
     
    • Quetzaltenango Department
      • El Palmar
        • Santiaguito Dome (Santiaguito Volcano)
    		www.excaliburmineral.com/
    Hungary
     
    • Nógrád Co.
      • Mátra Mts.
        • 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.
    A Listing of North Carolina Minerals- Leonard S.Wiener and Sigrid Ballew-2001
      • Swain Co.
    		Mineralogical Record March - April 2000
    Mineral and/or Locality
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