Surendra P. Verma, E. Santoyo & Fernando Velasco-Tapia (2002) "Statistical Evaluation of Analytical Methods for the Determination of Rare-Earth Elements in Geological Materials and Implications for Detection Limits", International Geology Review, 44:4, 287–335, doi:10.2747/0020-6814.44.4.287 (note geochemists refer to lanthanides as rare earth per ref.).
2016 extraction per Commodity Statistics and Information. USGS. All production numbers are for mines, except for Al, Cd, Fe, Ge, In, N, Se (plants, refineries), S (all forms) and As, Br, Mg, Si (unspecified). Data for B, K, Ti, Y are given not for the pure element but for the most common oxide, data for Na and Cl are for NaCl. For many elements like Si, Al, data are ambiguous (many forms produced) and are taken for the pure element. U data is pure element required for consumption by current reactor fleet [1]Archived 2017-10-01 at the Wayback Machine. WNA.
2016 extraction per Commodity Statistics and Information. USGS. All production numbers are for mines, except for Al, Cd, Fe, Ge, In, N, Se (plants, refineries), S (all forms) and As, Br, Mg, Si (unspecified). Data for B, K, Ti, Y are given not for the pure element but for the most common oxide, data for Na and Cl are for NaCl. For many elements like Si, Al, data are ambiguous (many forms produced) and are taken for the pure element. U data is pure element required for consumption by current reactor fleet [1]Archived 2017-10-01 at the Wayback Machine. WNA.
world-nuclear.org
2016 extraction per Commodity Statistics and Information. USGS. All production numbers are for mines, except for Al, Cd, Fe, Ge, In, N, Se (plants, refineries), S (all forms) and As, Br, Mg, Si (unspecified). Data for B, K, Ti, Y are given not for the pure element but for the most common oxide, data for Na and Cl are for NaCl. For many elements like Si, Al, data are ambiguous (many forms produced) and are taken for the pure element. U data is pure element required for consumption by current reactor fleet [1]Archived 2017-10-01 at the Wayback Machine. WNA.
