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First Occurrence of the Garnet-Ilmenite Transition in Silicates

Liu, Lin-Gun (1977) First Occurrence of the Garnet-Ilmenite Transition in Silicates. Science, 195 (4282). pp. 990-991. ISSN 0036-8075. http://resolver.caltech.edu/CaltechAUTHORS:20151116-151633656

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Abstract

Pyrope garnet (Mg_3Al_2Si_3O_(12)) has been found to transform to an ilmenite-type phase at a loading pressure between 240 and 250 kilobars and at about 1000° to 1400°C in a diamond-anvil press coupled with laser heating. The lattice parameters for the ilmenite-type phase of (Mg_(.75) Al_(.25))(Si_(.75) Al_(.25))O_3 are a_0 = 4.755 ± 0.002 and c_0 = 13.360 ± 0.005 angstroms. The zero-pressure volume change associated with the garnet-ilmenite transition is calculated to be –7.1 percent. This result verifies the prediction that pyrope garnet would transform to the ilmenite structure at high pressure first suggested in 1962 by Clark et al. and Ringwood.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1126/science.195.4282.990DOIArticle
http://www.sciencemag.org/content/195/4282/990.abstractPublisherArticle
http://www.jstor.org/stable/1743730JSTORArticle
Additional Information:© 1977 American Association for the Advancement of Science. Received for publication 8 October 1976. I thank A. E. Ringwood and S. E. Kesson for reading and commenting on the manuscript.
Record Number:CaltechAUTHORS:20151116-151633656
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151116-151633656
Official Citation:First Occurrence of the Garnet-Ilmenite Transition in Silicates LIN-GUN LIU Science 11 March 1977: 195 (4282), 990-991. [DOI:10.1126/science.195.4282.990]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62143
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Nov 2015 23:36
Last Modified:13 Feb 2019 18:06

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