Table 5.
Trace Pb and REE concentrations in the REEPO4 standardsa (concentrations and uncertainties in mass fraction × 102)
| USNM # | ScPO4 168495 | YPO4 168499 | LaPO4 168490 | CePO4 168484 | PrPO4 168493 | NdPO4 168492 | SmPO4 168494 | EuPO4 168487 |
|---|---|---|---|---|---|---|---|---|
| ScKα | .01 ± .01 | .01 ± .02 | .01 ± .01 | .01 ± .01 | .01 ± .01 | .01 ± .01 | .00 ± .00 | |
| YLα | .01 ± .02 | .01 ± .01 | .01 ± .01 | .00 ± .01 | .02 ± .03 | .01 ± .02 | .00 ± .00 | |
| LaLα | .01 ± .01 | .02 ± .03 | .00 ± .00 | .03 ± .05 | .02 ± .04 | .03 ± .03 | .01 ± .01 | |
| CeLα | .00 ± .01 | .05 ± .06 | .01 ± .01 | .03 ± .04 | .03 ± .04 | .03 ± .04 | .02 ± .02 | |
| PrLα | .03 ± .03 | .01 ± .02 | .07 ± .13b | .02 ± .03 | .00 ± .01 | .01 ± .01 | .02 ± .03 | |
| NdLα | .00 ± .00 | .01 ± .02 | .00 ± .01 | .01 ± .02 | .01 ± .03 | .00 ± .01 | .04 ± .04 | |
| SmLα | .02 ± .03 | .01 ± .02 | .01 ± .02 | .02 ± .04 | .01 ± .02 | .00 ± .00 | .01 ± .02 | |
| EuLα | .02 ± .03 | .01 ± .02 | .03 ± .03 | .00 ± .01 | .08 ± .11b | .03 ± .05 | .03 ± .02 | |
| GdLα | .02 ± .03 | .02 ± .03 | .03 ± .06 | .04 ± .05 | .01 ± .03 | .02 ± .03 | .00 ± .00 | .02 ± .05 |
| TbLα | .01 ± .01 | .02 ± .03 | .02 ± .03 | .00 ± .01 | .03 ± .04 | .00 ± .00 | .03 ± .05 | .00 ± .01 |
| DyLα | .03 ± .02 | .02 ± .02 | .03 ± .04 | .02 ± .03 | .00 ± .00 | .00 ± .00 | .00 ± .00 | .02 ± .03 |
| HoLα | .01 ± .02 | .01 ± .02 | .02 ± .03 | .02 ± .03 | .00 ± .00 | .00 ± .01 | .00 ± .00 | .00 ± .00 |
| ErLα | .03 ± .03 | .02 ± .02 | .02 ± .03 | .03 ± .04 | .00 ± .00 | .02 ± .03 | .07 ± .04 | .00 ± .00 |
| TmLα | .02 ± .02 | .01 ± .02 | .02 ± .02 | .01 ± .02 | .02 ± .03 | .02 ± .02 | .06 ± .07 | .06 ± .06 |
| YbLα | .00 ± .00 | .03 ± .04 | .02 ± .03 | .04 ± .05 | .04 ± .04 | .03 ± .03 | .02 ± .03 | .02 ± .03 |
| LuLα | .02 ± .03 | .01 ± .03 | .01 ± .02 | .03 ± .04 | .02 ± .03 | .04 ± .03 | .00 ± .00 | .00 ± .01 |
| PbMα | .00 ± .00 | .01 ± .01 | 1.05 ± .17 | 1.68 ± .07 | .77 ± .04 | .60 ± .03 | .99 ± .07 | .52 ± .06 |
| GdPO4 168488 | TbPO4 168496 | DyPO4 168485 | HoPO4 168489 | ErPO4 168486 | TmPO4 168497 | YbPO4 168498 | LuPO4 168491 | |
|---|---|---|---|---|---|---|---|---|
| ScKα | .01 ± .01 | .00 ± .00 | .01 ± .01 | .01 ± .02 | .01 ± .02 | .00 ± .00 | .00 ± .01 | .01 ± .02 |
| YLα | .01 ± .02 | .01 ± .02 | .07 ± .05 | .02 ± .03 | .02 ± .03 | .01 ± .01 | .04 ± .03 | .03 ± .03 |
| LaLα | .02 ± .04 | .01 ± .02 | .02 ± .04 | .03 ± .04 | .01 ± .02 | .01 ± .01 | .03 ± .05 | .02 ± .03 |
| CeLα | .03 ± .04 | .01 ± .02 | .02 ± .02 | .01 ± .03 | .03 ± .04 | .01 ± .01 | .01 ± .02 | .01 ± .02 |
| PrLα | .01 ± .02 | .01 ± .03 | .01 ± .02 | .02 ± .03 | .02 ± .04 | .01 ± .03 | .02 ± .05 | .01 ± .02 |
| NdLα | .01 ± .02 | .02 ± .03 | .01 ± .02 | .01 ± .03 | .02 ± .04 | .03 ± .04 | .00 ± .00 | .03 ± .04 |
| SmLα | .02 ± .03 | .00 ± .01 | .03 ± .04 | .00 ± .01 | .02 ± .02 | .03 ± .03 | .03 ± .03 | .02 ± .03 |
| EuLα | .09 ± .06 | .03 ± .03 | .00 ± .01 | .00 ± .01 | .01 ± .03 | .01 ± .01 | .01 ± .02 | .01 ± .01 |
| GdLα | .01 ± .02 | .01 ± .02 | .00 ± .01 | .00 ± .00 | .02 ± .02 | .02 ± .03 | .01 ± .01 | |
| TbLα | .01 ± .02 | .02 ± .03 | .01 ± .01 | .00 ± .00 | .02 ± .03 | .02 ± .03 | .01 ± .03 | |
| DyLα | .00 ± .00 | .00 ± .00 | .00 ± .00 | .02 ± .04 | .00 ± .00 | .06 ± .05 | .01 ± .03 | |
| HoLα | .14 ± .21b | .01 ± .02 | .11 ± .06 | .01 ± .01 | .01 ± .03 | .02 ± .04 | .03 ± .03 | |
| ErLα | .00 ± .00 | .05 ± .09 | .01 ± .02 | .00 ± .00 | .11 ± .07 | .02 ± .02 | .00 ± .01 | |
| TmLα | .01 ± .02 | .00 ± .00 | .03 ± .05 | .03 ± .03 | .00 ± .00 | .00 ± .01 | .04 ± .04 | |
| YbLα | .01 ± .01 | .02 ± .03 | .00 ± .01 | .00 ± .00 | .03 ± .04 | .00 ± .00 | .00 ± .00 | |
| LuLα | .09 ± .07 | .02 ± .03 | .02 ± .05 | .05 ± .07 | .00 ± .00 | .01 ± .04 | .00 ± .00 | |
| PbMα | .49 ± .07 | .02 ± .02 | .02 ± .03 | .02 ± .03 | .02 ± .02 | .01 ± .02 | .02 ± .03 | .04 ± .04 |
a
Average trace analyses of REE elements plus Sc, Y, and Pb for the USNM REE phosphates in the “Round Robin” mount measured at Berkeley. The quoted uncertainty is the measured one standard deviation value for 10 measurements.
b
Large magnitude interference corrections resulting in increasing uncertainty at trace levels. The apparent concentrations and large standard deviations for these three cases could be greatly reduced by using longer acquisition times on the unknown and the standard used for the interference correction.