Trace Elements in West Virginia Coals

Neodymium (Nd) Summary Statistics

Neodymium averaged 8.65 ppm (± 5.57 ppm) in West Virginia coals with a histogram showing a near normal distribution with a tail toward higher values and a maximum value of 41.40 ppm in a bench of the No. 2 Gas coal. Neodymium correlated poorly with ash yield and ash related elements such as vanadium (V), zirconium (Zr), chromium (Cr), thorium (Th), lithium (Li), scandium (Sc), lead (Pb) and gallium (Ga). Neodymium also correlated with several rare earth elements present in monazite, especially gadolinium (Gd), dysprosium (Dy), erbium (Er), cerium (Ce), europium (Eu), samarium (Sm) and lanthanum (La) plus yttrium (Y).

**Spearman Correlation Coefficients (r) with neodymium**
Ash Yield	V	Gd	Dy	Er	Y	Zr	Ce	Cr
+0.5845	+0.8278	+0.7632	+0.7626	+0.7516	+0.7319	+0.7265	+0.7192	+0.7008
n = 418	n = 417	n = 273	n = 55	n = 156	n = 418	n = 418	n = 416	n = 417
Eu	Sm	La	Th	Nb	Li	Sc	Pb	Ga
+0.6908	+0.6855	+0.6794	+0.6785	+0.6760	+0.6754	+0.6618	+0.6568	+0.6366
n = 410	n = 410	n = 415	n = 414	n = 417	n = 418	n = 418	n = 416	n = 418

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Page last revised: March 2, 2002

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