Talk:Alfred Rittmann

	Biography portal This article is within the scope of WikiProject Biography, a collaborative effort to create, develop and organize Wikipedia's articles about people. All interested editors are invited to join the project and contribute to the discussion. For instructions on how to use this banner, please refer to the documentation.BiographyWikipedia:WikiProject BiographyTemplate:WikiProject Biographybiography articles
	This article is supported by the science and academia work group.

Volcanoes Low‑importance

	Volcanoes portal This article is within the scope of WikiProject Volcanoes, a collaborative effort to improve the coverage of volcanoes, volcanology, igneous petrology, and related subjects on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.VolcanoesWikipedia:WikiProject VolcanoesTemplate:WikiProject VolcanoesWikiProject Volcanoes articles
Low	This article has been rated as Low-importance on the project's importance scale.

Switzerland Low‑importance

	Switzerland portal This article is within the scope of WikiProject Switzerland, a collaborative effort to improve the coverage of Switzerland on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.SwitzerlandWikipedia:WikiProject SwitzerlandTemplate:WikiProject SwitzerlandSwitzerland articles
Low	This article has been rated as Low-importance on the project's importance scale.

The Rittman-norm?[edit]

Does anyone have / know the geochemistry software called the Rittmann norm? These kind of programs do the following: One starts with a "melt", the content of which depends on the Na, Ca, Fe, Al, etc contents of a dissolved rock sample (in oxide form to complicate things). In the end one ends up with crystallized minerals of cetain proportions.

I once saw it printed in Algol in a book's appendix and it had huge tables with nomogram co-ordinates (misprinted during translation from computer printout to book).

The software and the Rittman norm would of course be obsolete by now, but still.... 83.241.159.50 (talk) 16:19, 17 February 2012 (UTC)[reply]

QAPF diagram ??? --Chris.urs-o (talk) 05:57, 13 October 2014 (UTC)[reply]