Mineralogy Database

Macdonaldite Mineral Data

Search Webmineral :
  

General Macdonaldite Information

Help on Chemical  Formula: Chemical Formula: BaCa4[Si16O36(OH)2]•10(H2O)
Help on Composition: Composition: Molecular Weight = 1,537.15 gm
   Barium     8.93 %  Ba    9.97 % BaO
   Calcium   10.43 %  Ca   14.59 % CaO
   Silicon   29.23 %  Si   62.54 % SiO2
   Hydrogen   1.44 %  H    12.89 % H2O
   Oxygen    49.96 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaCa4Si16O36(OH)2•10(H2O)
Help on Environment: Environment: Sanbornite-bearing metamorphic rocks near a granodiorite contact.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Big Creek - Rush Creek sanbornite deposit, 5 miles NE of Trimmer, Fresno Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Grodon Andrew Macdonald (1911-1978), American volcanologist, University of Hawaii.
Help on Name Pronunciation: Name Pronunciation: Macdonaldite + Pronunciation Say MACDONALDITE
Help on Synonym: Synonym: ICSD 23566
  PDF 18-163