Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
American Mineralogist Signup for GSW Email News
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
American Mineralogist; December 1983; v. 68; no. 11-12; p. 1223-1225
This Article
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Order Hardcopy of Full Text via AGI/GeoRef
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hauff, P. L.
Right arrow Articles by Hakki, W.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Hashemite, Ba(Cr,S)O 4 , a new mineral from Jordan

Phoebe L. Hauff, Eugene E. Foord, Sam Rosenblum, and Walid Hakki

U. S. Geol. Surv., Denver, CO, United States

Hashemite, Ba(Cr,S)O 4 , from west-central Jordan is associated with chromian ettringite, apatite, and calcite in a phosphatic carbonate rock analogous to the Hatrurim Formation in Israel. The mineral is orthorhombic, Pnma, with a = 9.112(2)Aa, b = 5.541(1)Aa, c = 7.343(1)Aa, Z = 4. It occurs as small, euhedral, dark-brown, commonly zoned crystals with an averaged D(meas.) = 4.59 g/cm 3 and a hardness of 3.5. Hashemite is biaxial (+): refractive indices on light and dark material are: (dark) alpha = 1.952(2), beta = 1.960(2), gamma = 1.977(2); (light) alpha = 1.810(2), beta = 1.813(2), gamma = 1.824(2). 2V 2 (+) varies from 35 degrees to 57 degrees . Microprobe analyses of zoned crystals yield BaO = 61.4, CrO 3 = 31.3, and SO 3 = 7.50 summing to 100.00.--Modified journal abstract.

This record provided courtesy of AGI/GeoRef.






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2008 by Mineralogical Society of America