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Banalsite

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Formula:
BaNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
System:OrthorhombicColour:White
Hardness:6
Member of:Feldspar Group
Name:The name is derived from the chemical symbols of the elements in its composition: barium (Ba), sodium (Na), Aluminum (Al) and silicon (Si).


Feldspar Group.

Forms a solid-solution series with stronalsite


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
Simplified for copy/paste:BaNa2[Al2Si2O8]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

Series:Forms a series with Stronalsite (see here)
Member of:Feldspar Group
Other Members of Group:

- +
Albite
NaAlSi
 
3
O
 
8
Amazonite
Andesine
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
Anorthite
CaAl
 
2
Si
 
2
O
 
8
Anorthoclase
(Na,K)AlSi
 
3
O
 
8
Buddingtonite
(NH
 
4
)AlSi
 
3
O
 
8
Bytownite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
Celsian
BaAl
 
2
Si
 
2
O
 
8
Dmisteinbergite
CaAl
 
2
Si
 
2
O
 
8
Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
Labradorite
(Ca,Na)[Al(Al,Si)Si
 
2
O
 
8
]
Microcline
KAlSi
 
3
O
 
8
Oligoclase
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
Orthoclase
KAlSi
 
3
O
 
8
Paracelsian
BaAl
 
2
Si
 
2
O
 
8
Reedmergnerite
Na[BSi
 
3
O
 
8
]
Sanidine
KAlSi
 
3
O
 
8
Slawsonite
(Sr,Ca)Al
 
2
Si
 
2
O
 
8
Stronalsite
SrNa
 
2
[Al
 
2
Si
 
2
O
 
8
]
 
2
Svyatoslavite
CaAl
 
2
Si
 
2
O
 
8
Related Minerals - Nickel-Strunz Grouping):

- +
9.FA.05Kaliophilite
KAlSiO
 
4
9.FA.05Kalsilite
KAlSiO
 
4
9.FA.05Nepheline
(Na,K)AlSiO
 
4
9.FA.05Panunzite
(K,Na)AlSiO
 
4
9.FA.05Trikalsilite
(K,Na)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
BaAl
 
2
Si
 
2
O
 
8
9.FA.30Hyalophane
(K,Ba)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.30Microcline
KAlSi
 
3
O
 
8
9.FA.30Orthoclase
KAlSi
 
3
O
 
8
9.FA.30Sanidine
KAlSi
 
3
O
 
8
9.FA.30Rubicline
(Rb,K)AlSi
 
3
O
 
8
9.FA.30Monalbite
NaAlSi
 
3
O
 
8
9.FA.35Albite
NaAlSi
 
3
O
 
8
9.FA.35Andesine
(Na,Ca)[Al(Si,Al)Si
 
2
O
 
8
]
9.FA.35Anorthite
CaAl
 
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
BaAl
 
2
Si
 
2
O
 
8
9.FA.45Svyatoslavite
CaAl
 
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
BaAl
 
2
Si
 
2
O
 
8
16.12.5Paracelsian
BaAl
 
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
(Si
 
2
O
 
6
)
 
2
(OH)
 
4
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
((Si,Al,Fe)
 
4
O
 
10
)(S,OH)
 
2
16.12.16Fraipontite
(Zn,Al)
 
3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
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
(AlSi
 
3
O
 
10
)(OH)
 
2
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
  • Banalsite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Banalsite

    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.
    Burma (Myanmar)
     
    • Kachin State
      • Mohnyin District (Moe Hnyin District)
        • Hpakant Township (Hpakan; Phakant; Phakan)
          • Hpakant-Tawmaw Jade Tract
    Ferraris, C., Parodi, G.C., Pont, S., Rondeau, B., Lorand, J.-P. (2014): Trinepheline and fabriesite: two new mineral species from the jadeite deposit of Tawmaw (Myanmar). European Journal of Mineralogy, 26, (in press).
    Canada
     
    • British Columbia
      • Golden Mining Division
    Mark Mauthner Collection (Personally Collected)
    • Ontario
      • Thunder Bay District
        • Killala Lake Area
    The Canadian Mineralogist Vol. 44, pp. 929-942 (2006)
    Finland
     
    • Northern Finland Region
      • Ranua
    Mutanen, T. 2011. Alkalikiviä ja appiniitteja. Raportti hankkeen " Magmatismi ja malminmuodostus II" toiminnasta 2002-2005.
    Guatemala
     
    • Motagua Valley
    Mikhail Ostrooumov and Alfredo Victoria Morales (2010) Mexican jadeite-bearing rock: a first mineralogical and gemmological approach. The Journal of Gemmology, Vol. 32, No. 1–4.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Tokyo Prefecture
          • Nishi-Tama-gun
            • Okutama-cho
    Tokyo University collection; Alfredo Petrov collection
    Norway
     
    • Troms
      • Ringvassøy
    Bøe, P. (2000): En gang av alkaline bergarter i Mikkelvik, Ringvassøy i Troms. Norsk Bergverksmuseum Skrift. 17, 71-79
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
    P.M. Kartashov data; The Canadian Mineralogist Vol. 44, pp. 929-942 (2006)
    • 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
     
    • North West Province
      • Western Bushveld Complex
        • Rustenburg District
    The Canadian Mineralogist, V 42, 2004, pp. 1169-1178.
    • Northern Cape Province
    Cairncross/Dixon, 1995. Minerals of South Africa
    Minerals of South Africa
    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.
    • Västmanland
      • Hällefors
        • Grythyttan
    Ulf Nyberg photo & specimen
    UK
     
    • Wales
      • Gwynedd (Caernarvonshire)
        • Lleyn Peninsula
          • Llanfaelrhys
            • Rhiw
    Min.Mag.(1944) 27, 33-48; UK Journal of mines & Minerals, number 29 pp47-48
    USA
     
    • California
      • San Benito Co.
        • Diablo Range
          • New Idria District
            • San Benito River headwaters area
              • Dallas Gem Mine area
                • Santa Rita Peak
    Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 362.
    Mineral and/or Locality  
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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