Table II

XRF Analyses of 3 Rouble Platinum Coins
Coin Ti Mn Fe Ni Cu Rh Pd Ag Sn Ir Au Sum, %
1829 110 < 20 12,300 60 2800 1100 1350 680 10 3500 1100 2.3
100 < 20 12,500 80 3000 1150 1270 900 < 5 3700 1050
1831 40 < 20 6700 250 1600 790 540 220 < 5 9400 1100 2.1
300 < 20 6900 230 1850 770 530 160 10 9200 850
1832 60 < 20 15,800 680 4200 1100 760 220 10 13,200 510 3.5
180 180 14,300 600 5100 1050 710 140 10 12,100 280
1835 140 < 20 5700 125 1200 520 210 240 30 9200 630 1.8
240 620 5200 140 1050 610 260 200 30 8400 1000
1836 140 100 13,800 470 3100 1400 610 215 60 14,100 220 3.5
280 480 14,500 410 4200 1400 590 475 20 13,300 190
1837 50 190 10,600 440 5900 870 570 195 15 14,100 550 3.6
25 180 13,700 1540 7300 890 550 1180 850 10,800 430
1838* 530 < 20 11,800 340 2850 760 290 100 60 12,200 1100 4.1
280 < 20 11,300 440 10,300 760 280 825 80 15,100 13,200
1842 50 < 20 7000 340 2900 1500 1380 220 30 16,700 950 3.1
160 70 5100 230 2250 1650 2000 190 75 18,700 1050
1828** 520 90 6100 50 290 90 140 50 10 2250 < 300 0.7
< 20 < 20 130 < 20 260 85 140 50 5 2300 < 300
1977 < 20 < 20 480 < 20 110 60 140 < 5 < 5 < 300 < 300 < 0.2
< 20 < 20 650 < 20 170 50 90 < 5 < 5 < 300 < 300

Measured using a “Spectro X-LAB 2000” XRF spectrometer. All data in ppm. The upper row gives values for the obverse, the lower row for the reverse. Other metals were also found in most coins, up to hundreds of ppm, such as zinc. *The 1838 coin has gold specks visible on its reverse. **The 1828 coin is a ‘Novodel’ issue, probably produced in the late 19th or early 20th century