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AMPH-IMA04: a revised Hypercard program to determine the name of an amphibole from chemical analyses according to the 2004 International Mineralogical Association scheme

Published online by Cambridge University Press:  05 July 2018

A. Mogessie ,
K. Ettinger  and
B. E. Leake
A. Mogessie*
Affiliation:
Institute of Mineralogy and Petrology, University of Graz, Universitaetsplatz 2, A-8010, Austria
K. Ettinger
Affiliation:
Institute of Mineralogy and Petrology, University of Graz, Universitaetsplatz 2, A-8010, Austria
B. E. Leake
Affiliation:
School of Earth, Ocean and Planetary Sciences, Cardiff University, P.O.Box 914 Cardiff CF1 3YE, UK
*
*E-mail: aberra.mogessie@uni-graz.at
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Abstract

In 2004, the International Mineralogical Association (IMA) amended the IMA 97 amphibole classification and nomenclature scheme byadding a fifth group to include the recently discovered B(LiNa) amphiboles ferriwhittakeriite and ferri-ottoliniite, which cannot be fitted into the four major amphibole groups. New root-names such as sodic-pedrizite in the Mg-Fe-Mn-Li group and obertiite and dellaventuraite in the sodic group along with two new prefixes, parvo and magno have also been added. As result it has become necessary to modify the AMPH-IMA97 amphibole-naming program. The new program (AMPH-IMA04) allows single input or automatic input of as many amphibole analyses as are available following a set input format. Any of three different calculation schemes for dealing with an amphibole analysis can be chosen: (1) complete chemical analyses can be calculated to 24(O,OH,F,Cl); (2) analyses with determined FeO and Fe2O3, MnO and Mn2O3 but without H2O can be calculated to 23(O); and (3) electron microprobe analyses with only total Fe determined and without H2O can be calculated to 23(O) with IMA97-recommended normalization for Fe3+ and Fe2+ values. In addition a stoichiometric calculation of Mn2+ and Mn3+ is considered and implemented for the Mn-bearing sodic amphiboles in order to take care of electron microprobe analyses of such amphiboles where the total Mn is given as Mn2+.

Keywords

Hypercardamphibole classificationamphibole-namingIMA-nomenclature
Type
Research Article
Information
Mineralogical Magazine , Volume 68 , Issue 5 , October 2004 , pp. 825 - 830
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2004

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Supplementary material: File

Mogessie et al. supplementary material

The program AMPH-IMA04 (version a - compressed using Binhex) The program AMPH-IMA04 (version b - compressed using Stuffit) (This program is written in Hypercard and is for Mac users only 1 MB).

Download Mogessie et al. supplementary material(File)
File 63.2 KB
Supplementary material: File

Mogessie et al. supplementary material

The program AMPH-IMA04 (version a - compressed using Binhex) The program AMPH-IMA04 (version b - compressed using Stuffit) (This program is written in Hypercard and is for Mac users only 1 MB).

Download Mogessie et al. supplementary material(File)
File 1.1 MB
Supplementary material: File

Mogessie et al. supplementary material

The program AMPH-IMA04 (version a - compressed using Binhex) The program AMPH-IMA04 (version b - compressed using Stuffit) (This program is written in Hypercard and is for Mac users only 1 MB).

Download Mogessie et al. supplementary material(File)
File 382.6 KB