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	 Bytownite Mineral Data 
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General Bytownite  Information 
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  Chemical  Formula:  | 
(Ca,Na)(Si,Al)4O8    | 
  Composition:  | 
Molecular Weight = 275.01 gm    | 
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 Sodium     1.67 %  Na    2.25 % Na2O  | 
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 Calcium   11.66 %  Ca   16.31 % CaO  | 
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 Aluminum  17.66 %  Al   33.37 % Al2O3  | 
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 Silicon   22.47 %  Si   48.07 % SiO2  | 
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 Oxygen    46.54 %  O  | 
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          ______        ______   | 
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          100.00 %      100.00 % = TOTAL OXIDE  | 
  Empirical Formula:  | 
Na0.2Ca0.8Al1.8Si2.2O8    | 
  Environment:  | 
Magmatic and metamorphic rocks.    | 
  IMA Status:  | 
Not Approved IMA 1835    | 
  Locality:  | 
"Bytown," now Ottawa, Ontario, Canada. Link to MinDat.org Location Data.  | 
  Name Origin:  | 
Named after its locality.    | 
  Name Pronunciation:  | 
 Bytownite  + Pronunciation     | 
  Synonym:  | 
Ab20    | 
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An80    | 
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ICSD 34791    | 
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PDF 41-1481    | 
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