|  |  | 
	 Walstromite Mineral Data  |  |  | 
   
| General Walstromite  Information  | 
|  Chemical  Formula: | BaCa2Si3O9 | 
|  Composition: | Molecular Weight = 445.73 gm | 
|  | Barium   30.81 %  Ba   34.40 % BaO | 
|  | Calcium  17.98 %  Ca   25.16 % CaO | 
|  | Silicon  18.90 %  Si   40.44 % SiO2 | 
|  | Oxygen   32.31 %  O | 
|  | ______        ______ | 
|  | 100.00 %      100.00 % = TOTAL OXIDE | 
|  Empirical Formula: | BaCa2Si3O9 | 
|  Environment: | Metamorphosed metasediments. | 
|  IMA Status: | Approved IMA 1965 | 
|  Locality: | Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data. | 
|  Name Origin: | Named for Robert E. Walstrom (1920-), American mineral collector, who discovered the mineral. | 
|  Name Pronunciation: | Walstromite  + Pronunciation   | 
|  |