UNIVERSITY OF CALIFORNIA PUBLICATIONS 

 Bulletin of the Department of Geology 



Vol. 3, No. 9, pp. 231=236, PI. 20 ANDREW C. LAWSON, Editor 



PALACHEITE 



BY 



Arthur S. Eakle 



CONTENTS 



PAGE 



Introduction 231 



Name of Mineral 231 



Occurrence 231 



Crystallographic Characters 232 



Measurements 232 



System and Habit 232 



Polar Elements and Axial Ratio 232 



Forms 233 



Calculated Table 233 



Interfacial Angles 234 



Physical Properties 234 



General Characters 234 



. Optical Characters 234 



Chemical Properties 235 



Pyrognostics 235 



Composition 235 



Rubrite 236 



INTRODUCTION. 



Name of Mineral. — A mineral occurring in bright red crystals 

 was found, about a year ago, in the Redington mercury mine, 

 Knoxville, California, in considerable quantity. It proves to be 



a new hydrous basic sulphate of iron and magnesium, for which 

 the author proposes the name palacheite, in honor of Dr. Charles 

 Palache of Harvard University. 



Occurrence . — The specimens are loosely coherent aggregates 

 of minute crystals, which readily crumble on the slightest pressure 

 into smaller aggregates or bunches of crystals. There is no 

 cementing matrix whatever, the specimens being merely inter- 

 grown crystals; even the smallest crystal seems to be an 



