Electron Microprobe Standards
This table shows coordinates, some compositions, and stage currents at 15kV beam energy and 12nA beam current. Low stage currents indicate that elements with high atomic numbers are present. The high number of electrons per atom deflect incoming electrons more strongly. This results in a strong backscattered electron detector signal and a low stage current.
|
|
OXIDE - SILICATE BAR |
X (microns) |
Y (microns) |
Stage Current (nA) |
| 1 | SiO2 (synthetic) | 30816 | 20704 | 10.3 |
| 2 | TiO2 (synthetic) | 27801 | 20519 | 9.6 |
| 3 | Al2O3 (synthetic) | 24697 | 20615 | 10.3 |
| 4 | Fe2O3 (synthetic) | 21688 | 20616 | 9.1 |
| 5 | MnO (synthetic) | 18750 | 20616 | 9.1 |
| 6 | MgO (synthetic) | 15727 | 20687 | 10.4 |
| 7 | Wollastonite (synthetic) - 48.28% CaO 51.72$ SiO2 | 12733 | 20687 | 9.9 |
| 8 | Jadeite BM1913451 - 51.1% Na2O | 9591 | 20616 | 10.3 |
| 9 | Amelia Albite Ab-1 - 65.63% SiO2 20.83% Al2O3 | 6676 | 20616 | 10.1 |
| 10 | Orthoclase Or-1A - 14.92% K2O | 3686 | 20688 | 10.1 |
| 11 |
|
599 | 20688 |
|
| 12 | Beeson Apatite - 40.93% P2O5 | 30786 | 17676 | 9.7 |
| 13 | Durango Apatite USNM104021 | 27757 | 17677 | 9.7 |
| 14 | Fluorite CaF2 (natural) | 24804 | 17677 | 9.7 |
| 15 | Sodalite PSU4-296-2 - 7.0% Cl | 21738 | 17649 | 10.2 |
| 16 | Benetoite USNM 86539 | 18712 | 17649 | 8.9 |
| 17 | ZrO2 (synthetic) | 15725 | 17731 | 8.3 |
| 18 | Cr2O3 (synthetic) | 12795 | 17776 | 9.3 |
| 19 | NiO (synthetic) | 9749 | 17777 | 8.8 |
| 20 | CoO (synthetic) | 6671 | 17777 | 8.9 |
| 21 | Vanadinite ((PbCl)Pb4(VO4)3) - 6.42% V2O5 | 3690 | 17672 | 7.0 |
| 22 | Celestine (SrSO4) | 651 | 17844 | 8.9 |
| 23 | REE-1 Eu Gd Tb Tm | 30786 | 14647 | 9.4 |
| 24 | REE-2 Nd Sm Yb Lu | 27748 | 14593 | 9.4 |
| 25 | REE-3 Y La Ce Pr | 24704 | 14772 | 9.5 |
| 26 | REE-4 Dy Ho Er | 21712 | 14613 | 9.5 |
| 27 | Comenditic glass KN-18 | 18736 | 14613 | 10.1 |
| 28 | Basaltic glass VG-99 | 15734 | 14656 | 9.9 |
| 29 | Rhyolitic glass VG-568 | 12796 | 14613 | 10.2 |
| 30 |
Garnet reference - 39.0% SiO2, 0.08% TiO2, 22.1% Al2O3, 22.03% FeO(T), 0.49% MnO, 11.53% MgO, 4.20% CaO. |
9698 | 14677 | 9.9 |
| 31 | Cinnabar HgS - 86.23% Hg 13.77%S | 6760 | 14677 | 6.8 |
| 32 | Galena PbS - 86.60% Pb 13.40%S | 3680 | 14685 | 6.6 |
| 33 | Pyrite FeS2 - 46.55% Fe 53.45%S | 609 | 14796 | 9.0 |
|
|
METAL - ALLOY - SULPHIDE BAR |
X (microns) |
Y (microns) |
Stage Current (nA) |
| 1 | Mg | 30975 | 10685 | 10.0 |
| 2 | Al | 27969 | 10764 | 9.9 |
| 3 | Si | 24921 | 10723 | 9.8 |
| 4 | C | 21933 | 10704 | 11.0 |
| 5 | Sc | 18903 | 10753 | 8.9 |
| 6 | Ti | 15903 | 10753 | 8.8 |
| 7 | V | 12903 | 10693 | 8.8 |
| 8 | Cr | 9926 | 10771 | 8.7 |
| 9 | Mn | 6892 | 10696 | 8.6 |
| 10 | Fe | 3857 | 10608 | 8.5 |
| 11 | Co | 857 | 10690 | 8.3 |
| 12 | Ni | 30975 | 7585 | 8.2 |
| 13 | Cu | 27975 | 7744 | 8.1 |
| 14 | Zn | 24910 | 7744 | 8.1 |
| 15 | Ge | 21880 | 7661 | 7.9 |
| 16 | As | 18804 | 7676 | 7.8 |
| 17 | Se | 15861 | 7684 | 7.6 |
| 18 | Zr | 12861 | 7738 | 7.4 |
| 19 | Mo | 9861 | 7738 | 7.4 |
| 20 | Ag | 6806 | 7738 | 7.1 |
| 21 | Cd | 3806 | 7738 | 7.0 |
| 22 | Sn | 806 | 7738 | 6.9 |
| 23 | Sb | 30970 | 4677 | 6.8 |
| 24 | Te | 27970 | 4677 | 6.7 |
| 25 | W | 24970 | 4677 | 6.3 |
| 26 | Re | 21979 | 4723 | 6.1 |
| 27 | Pt | 18837 | 4723 | 6.2 |
| 28 | Au | 15837 | 4723 | 6.1 |
| 29 | Rh | 12837 | 4723 | 7.2 |
| 30 | Bi | 9837 | 4673 | 6.0 |
| 31 | Pd | 6904 | 4716 | 7.2 |
| 32 | Nb | 3811 | 4716 | 7.4 |
| 33 | Ta | 811 | 4716 | 6.3 |
| 50 | Os | 11278 | 6100 | 6.2 |
| 51 | Ir | 8285 | 6125 | 6.4 |
| 52 | Ru | 5285 | 6125 | 7.3 |
| 53 | GaAs - Ga 48.20% As 51.80% | 2285 | 6183 | 7.9 |
MINERALS BAR |
X (microns) |
Y (microns) |
Stage Current (nA) |
|
| 1 | Kakanui Augite - 50.73% SiO2 | 30802 | 30356 | 10.0 |
| 2 | PX-1 Pyroxene | 27810 | 30361 | 10.0 |
| 3 | Diopside 63 - 1827 | 24774 | 30361 | 10.1 |
| 4 | Springwater Olivine 2566 - 38.95% SiO2 43.58% MgO | 21790 | 30379 | 10.1 |
| 5 | San Carlos Olivine 111312/444 - 40.81% SiO2 49.42% MgO | 18810 | 30338 | 10.2 |
| 6 |
|
15810 | 30415 |
|
| 7 |
|
12810 | 30415 |
|
| 8 |
|
9810 | 30415 |
|
| 9 |
|
6810 | 30415 |
|
| 10 | 381 - Rh 45.81% Sb 54.19% | 3810 | 30415 |
|
| 11 | 374 - Pt 77.74% Fe 22.26% | 763 | 30415 |
|
| 12 | Engels Amphibole | 30802 | 27391 | 9.9 |
| 13 | Hornblende 4-190 | 27813 | 27382 | 9.8 |
| 14 | Tremolite 62-1717 | 24840 | 27317 | 10.2 |
| 15 | Grunerite R-2469 | 21833 | 27302 | 9.9 |
| 16 | Biotite PSU 5-110 | 18800 | 27362 | 10.0 |
| 17 | Biotite R-2208 | 15800 | 27362 | 9.8 |
| 18 |
|
12855 | 27344 |
|
| 19 |
|
9830 | 27344 |
|
| 20 |
|
6790 | 27383 |
|
| 21 | 410 - Pt 77.36% Fe 18.61% Cu 4.03% | 3790 | 27409 |
|
| 22 | 425 - Pd 76.84% S 23.16% | 761 | 27370 |
|
| 23 | Davidite | 30802 | 24336 | 8.8 |
| 24 | Euxenite | 27802 | 24336 | 8.2 |
| 25 | Gahnite 145883 | 24767 | 24381 | 9.6 |
| 26 | Ilmenite 96189 | 21819 | 24299 | 9.3 |
| 27 | Scapolite 63-1805 | 18819 | 24353 | 10.2 |
| 28 |
|
15819 | 24353 |
|
| 29 |
|
12819 | 24353 |
|
| 30 |
|
9727 | 24353 |
|
| 31 |
|
6727 | 24353 |
|
| 32 | 426 - Pt 68.10% Pd 15.92% S 15.98% | 3727 | 24368 |
|
| 33 | 462 - Pd 73.96% As 26.04% | 727 | 24368 |
|
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