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Proposed Change in Calculation of Norms of Rocks
- Source :
- Zeitschrift für Kristallographie, Mineralogie und Petrographie. 42:1-7
- Publication Year :
- 1932
- Publisher :
- Springer Science and Business Media LLC, 1932.
-
Abstract
- It is proposed that the following normative pyroxene minerals be used: CaSiO3, MgSiO3, and FeSiO3 (with symbols “wo,” “en,” and “ hy,” respectively); and that the olivine molecule be given in terms of Mg2SiO4 and Fe2SiO4 (with symbols “ fo ” and “fa”). It is shown that these changes will improve the norm by bringing the ferro-magnesian minerals into a closer approach to natural conditions, by making it easier to survey their composition, and by rendering calculations simpler.
Details
- ISSN :
- 03734218
- Volume :
- 42
- Database :
- OpenAIRE
- Journal :
- Zeitschrift für Kristallographie, Mineralogie und Petrographie
- Accession number :
- edsair.doi...........63a9f03044046fcd55e93b7f0f5b488a