Discovery Team
Anthony R. Kampf
Mark A. Cooper
George R. Rossman
Barbara P. Nash
Frank C. Hawthorne
Joe Marty

26

Davidbrownite-(NH4)

Verified December 2018   

(NH4)5(VO)2(C2O4)[PO2.75(OH)1.25]4ยท3H2O

Lead author Anthony Kampf notes that davidbrownite is the second mineral containing essential phosphate and oxalate, the first being phoxite, which is found in the same bat guano assemblage at the Rowley mine. The structure of davidbrownite contains novel vanadate-phosphate-oxalate chains, which are linked into sheets via very strong hydrogen bonds. Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 66951, 66955 and 66959

References: Mindat. | Report an error or offer more information
Davidbrownite, 1.14mm FOV. The deep blue crystals in the image are antipinite. Photograph by Anthony Kampf.

cc 2019. Carbon Mineral Challenge.