The Aluminum û Iron Phosphatic Overburden of Christmas Island, Indian Ocean: Its Mineralogy, Mineral Chemistry and Thermal Transformations
- Organization:
- The Australasian Institute of Mining and Metallurgy
- Pages:
- 21
- File Size:
- 1112 KB
- Publication Date:
- Jan 1, 1971
Abstract
The phosphatic overburden of Christmas Island is a lateritic soil and consists dominantly of crandallite and millisite. These minerals are polymorphs of general formula, (Na,K)x Ca2-x (Al, Fe)6 (PO4)4 (OH)10-x (2+x) H2O. Iron occurs only in millisite. Both minerals exhibit similar thermal transformations, dehydroxylating near 600¦C and recrystallizing above 800¦C. Dehydroxylation results in crystal structure collapse but retention of crystal morphology. Ggethite, boehmite and apatite are minor constituents of some-of the phosphatic Soils.
Citation
APA: (1971) The Aluminum û Iron Phosphatic Overburden of Christmas Island, Indian Ocean: Its Mineralogy, Mineral Chemistry and Thermal Transformations
MLA: The Aluminum û Iron Phosphatic Overburden of Christmas Island, Indian Ocean: Its Mineralogy, Mineral Chemistry and Thermal Transformations. The Australasian Institute of Mining and Metallurgy, 1971.