Important chemical and structural data on Johachidolite

Important chemical and structural data on Johachidolite published by Swiss universities and GRS in ‘Schreyer Memorial Issue’ of European Journal of Mineralogy

By Eur. J. Mineral. 2008, 20, 965–973 Published online July 2008

Johachidolite, CaAl[B3O7], a mineralogical and structural peculiarity

Milen KADIYSKI¹, Thomas ARMBRUSTER¹,*, Detlef GÜNTHER², Eric REUSSER³ and Adolf PERETTI⁴

¹ Mineralogical Crystallography, Institute of Geological Sciences, University of Bern, Freiestr. 3, 3012 Bern, Switzerland
*Corresponding author, e-mail: thomas.armbruster@krist.unibe.ch
² Laboratorium für Anorganische Chemie, ETH Hönggerberg, HCI, 8093 Zürich, Switzerland
³ Institut für Mineralogie und Petrographie, ETH-Zentrum, 8092 Zürich, Switzerland
⁴ GRS GemResearch Swisslab AG, P.O. Box 4028, 6002 Lucerne, Switzerland

The most specialized structure-related publication on Johachidolite is the summary of a cooperative research project between Swiss Universities (SFIT and University of Berne, Johachidolite, CaAl[B3O7], a mineralogical and structural peculiarity) including chemical testing (LA-ICP-MS, Electron Microprobe Analysis), spectroscopic testing FTIR (Infrared) Spectroscopy) and structural analysis.

Up to this date this is the latest and most modern data set for the characterization of the mineral “Johachidolite”. For a further back-up on the origin of Johachidolite go to Contributions to Gemology No.5, which is also available in book format from GRS.

A 4.51 cts. Gem quality yellow Johachidolite from Pyant Gyi mining area (GRS collection)	Johachidolite crystal of 0.36 cts. (GRS collection)	Crystal Structure by Milen KADIYSKI, Thomas ARMBRUSTER
Electron Microprobe at the Swiss Federal Institute of Technology, IMP ETHZ, Zurich, Switzerland (Dr. Eric Reusser)	Laser Ablatoin Mass Spectroscopy (LA-ICP-MS) at the Laboratory for Inorganoc Chemistry, SFIT ZH, Switzerland (Prof. D. Günther)

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