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Banalsite

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Långban, Filipstad, Värmland, Sweden
© Knut Eldjarn

Show Banalsite Photos (3)
Formula:
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
System:OrthorhombicColour:White
Hardness:6


Feldspar Group

Classification of Banalsite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/J.07-100
Nickel-Strunz 10th (pending) edition ID:9.FA.60

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
Dana 8th edition ID:76.1.6.1

76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
Hey's CIM Ref.:16.12.8

16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
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Type Occurrence of Banalsite

Type Locality:Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK
Year of Discovery:1944

Physical Properties of Banalsite

Colour:White
Streak:White
Hardness (Mohs):6
Cleavage:Distinct/Good

Crystallography of Banalsite

Crystal System:Orthorhombic
Cell Parameters:a = 8.49Å, b = 9.98Å, c = 16.75Å
Ratio:a:b:c = 0.851 : 1 : 1.678
Unit Cell Volume:V 1,419.23 ų (Calculated from Unit Cell)

Optical Data of Banalsite

Type:Biaxial (+)
RI values: nα = 1.570 nβ = 1.571 nγ = 1.578
2V:Measured: 41° , Calculated: 52°
Maximum Birefringence:δ = 0.008

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:r > v

Chemical Properties of Banalsite

Formula:
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
Essential elements:Al, Ba, Na, O, Si
All elements listed in formula:Al, Ba, Na, O, Si
Common Impurities:Mn,Mg,Ca,K

Relationship of Banalsite to other Species

Related to:
  • Feldspar Group
    • Related Minerals - Nickel-Strunz Grouping):

    - +
    9.FA.05Kaliophilite
    K[AlSiO
     
    4
    		]
    9.FA.05Kalsilite
    K[AlSiO
     
    4
    		]
    9.FA.05Nepheline
    (Na,K)[AlSiO
     
    4
    		]
    9.FA.05Panunzite
    (Na,K)[AlSiO
     
    4
    		]
    9.FA.05Trikalsilite
    (Na,K)[AlSiO
     
    4
    		]
    9.FA.05Yoshiokaite
    (Ca,Na)[Al(Al,Si)O
     
    4
    		]
    9.FA.05Megakalsilite
    KAlSiO
     
    4
    9.FA.10Malinkoite
    NaBSiO
     
    4
    9.FA.15Virgilite
    LiAlSi
     
    2
    		O
     
    6
    9.FA.25Lisitsynite
    KBSi
     
    2
    		O
     
    6
    9.FA.30Adularia
    KAlSi
     
    3
    		O
     
    8
    9.FA.30Anorthoclase
    (Na,K)[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Buddingtonite
    (NH
     
    4
    		)[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Celsian
    Ba[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    9.FA.30Hyalophane
    (K,Ba)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    9.FA.30Microcline
    K[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Orthoclase
    K[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Sanidine
    K[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Rubicline
    (Rb,K)[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.30Monalbite
    Na[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.35Albite
    Na[AlSi
     
    3
    		O
     
    8
    		]
    9.FA.35Andesine
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    9.FA.35Anorthite
    Ca[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    9.FA.35Bytownite
    (Ca,Na)[Al(Al,Si)Si
     
    2
    		O
     
    8
    		]
    9.FA.35Labradorite
    (Ca,Na)[Al(Al,Si)Si
     
    2
    		O
     
    8
    		]
    9.FA.35Oligoclase
    (Na,Ca)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    9.FA.35Reedmergnerite
    Na[BSi
     
    3
    		O
     
    8
    		]
    9.FA.40Paracelsian
    Ba[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    9.FA.45Svyatoslavite
    Ca[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    9.FA.45Kumdykolite
    NaAlSi
     
    3
    		O
     
    8
    9.FA.50Slawsonite
    (Sr,Ca)[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    9.FA.55Lisetite
    CaNa
     
    2
    		Al
     
    4
    		Si
     
    4
    		O
     
    16
    9.FA.60Stronalsite
    SrNa
     
    2
    		[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
     
    2
    9.FA.65Danburite
    CaB
     
    2
    		Si
     
    2
    		O
     
    8
    9.FA.65Maleevite
    BaB
     
    2
    		Si
     
    2
    		O
     
    8
    9.FA.65Pekovite
    SrB
     
    2
    		Si
     
    2
    		O
     
    8
    9.FA.70Lingunite
    (Na,Ca)AlSi
     
    3
    		O
     
    8
    9.FA.75Kokchetavite
    KAlSi
     
    3
    		O
     
    8
    Related Minerals - Hey's Index Grouping:

    - +
    16.12.1Stronalsite
    SrNa
     
    2
    		[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
     
    2
    16.12.2Slawsonite
    (Sr,Ca)[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    16.12.3Brewsterite
    16.12.4Celsian
    Ba[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    16.12.5Paracelsian
    Ba[Al
     
    2
    		Si
     
    2
    		O
     
    8
    		]
    16.12.6Cymrite
    BaAl
     
    2
    		Si
     
    2
    		(O,OH)
     
    8
    		·H
     
    2
    		O
    16.12.7Edingtonite
    Ba[Al
     
    2
    		Si
     
    3
    		O
     
    10
    		] · 4H
     
    2
    		O
    16.12.9Harmotome
    (Ba
     
    0.5
    		,Ca
     
    0.5
    		,K,Na)
     
    5
    		[Al
     
    5
    		Si
     
    11
    		O
     
    32
    		] ·12H
     
    2
    		O
    16.12.10Hyalophane
    (K,Ba)[Al(Si,Al)Si
     
    2
    		O
     
    8
    		]
    16.12.11Balipholite
    BaLiMg
     
    2
    		Al
     
    3
    		[(OH)
     
    4
    		|Si
     
    2
    		O
     
    6
    		]
     
    2
    16.12.12Armenite
    BaCa
     
    2
    		Al
     
    6
    		Si
     
    9
    		O
     
    30
    		·2H
     
    2
    		O
    16.12.13Wellsite
    (Ba,Ca,K
     
    2
    		)Al
     
    2
    		Si
     
    6
    		O
     
    16
    		·6H
     
    2
    		O
    16.12.14Merlinoite
    (K,Na)
     
    5
    		(Ca,Ba)
     
    2
    		Al
     
    9
    		Si
     
    23
    		O
     
    64
    		·23H
     
    2
    		O
    16.12.15Anandite
    (Ba,K)(Fe
    2+
     
    		,Mg)
     
    3
    		[(O,OH)
     
    2
    		|(Si,Al,Fe)
     
    4
    		O
     
    10
    		]
    16.12.16Fraipontite
    (Zn,Al)
     
    3
    		[(OH)
     
    4
    		|(Si,Al)
     
    2
    		O
     
    5
    		]
    16.12.17Sauconite
    Na
     
    0.3
    		Zn
     
    3
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    2
    		·4H
     
    2
    		O
    16.12.18Minehillite
    (K,Na)
     
    2-3
    		Ca
     
    28
    		Zn
     
    4
    		Al
     
    4
    		Si
     
    40
    		O
     
    112
    		(OH)
     
    16
    16.12.19Hendricksite
    K(Zn,Mg,Mn
    2+
     
    		)
     
    3
    		[(OH)
     
    2
    		|AlSi
     
    3
    		O
     
    10
    		]
    16.12.20Baileychlore
    (Zn,Fe,Al,Mg)
     
    6
    		(Si,Al)
     
    4
    		O
     
    10
    		(OH)
     
    8

    Other Names for Banalsite

    Other Languages:
    German:Banalsit
    Spanish:Banalsita

    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 Banalsite

    Reference List:American Mineralogist: 30: 85.

    Mineralogical Journal: 7: 262-281.

    Internet Links for Banalsite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Banalsite in the Natural History Museum (London) online catalogue
  • Banalsite details from Handbook of Mineralogy (PDF)
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    Localities for Banalsite

    Hide Locality List
    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.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Tokyo Prefecture
          • Nishi-Tama-gun
            • Okutama
    		Tokyo University collection; Alfredo Petrov collection
    Norway
     
    • Troms
      • Ringvassøy
    		Bøe, P. (2000): En gang av alkaline bergarter i Mikkelvik, Ringvassøy i Troms. Bergverksmuseets Skrift 17, 71-79
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
    		P.M. Kartashov data
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 720-731.
    Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 720-731.
    Mikhailova, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Ivanyuk, G.Y., Men’shikov, Y.P., and Pakhomovsky, Y.A. (2007): Geology of Ore Deposits 49(7), 590-598.
    Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 720-731.
    Konopleva, N.G., Ivanyuk, G.Y., Pakhomovsky, Y.A., Yakovenchuk, V.N., Men’shikov, Y.P., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 720-731.
    South Africa
     
    • Northern Cape Province
    		Cairncross/Dixon, 1995. Minerals of South Africa
    Minerals of South Africa
    • Northwest Province
      • Western Bushveld Complex
        • Rustenburg District
          • Pilansberg Complex
    		The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.
    Sweden
     
    • Värmland
      • Filipstad
    		Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
    UK
     
    • Wales
      • Gwynedd (Caernarvonshire)
        • Lleyn Peninsula
          • Llanfaelrhys
            • Rhiw
    		Min.Mag.(1944) 27, 33-48
    Mineral and/or Locality
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