Platinum, From n and k fit to psi and delta
nm
NK
400	1.4243	2.8287
410	1.4496	2.8955
420	1.4708	2.9619
430	1.4899	3.0272
440	1.5098	3.0902
450	1.5311	3.152
460	1.5556	3.2157
470	1.5788	3.2804
480	1.5995	3.3464
490	1.6147	3.4013
500	1.6403	3.4602
510	1.6629	3.5272
520	1.6824	3.5933
530	1.7021	3.6513
540	1.7247	3.7134
550	1.747	3.7743
560	1.7697	3.8376
570	1.7915	3.899
580	1.8125	3.965
590	1.8408	4.0264
600	1.8609	4.0842
610	1.8908	4.1445
620	1.9187	4.2054
630	1.9438	4.2685
640	1.9666	4.3277
650	1.9978	4.3764
660	2.0275	4.4338
670	2.0541	4.4977
680	2.0765	4.5545
690	2.1013	4.599
700	2.1352	4.6591
710	2.1588	4.7147
720	2.1799	4.7705
730	2.2116	4.816
740	2.2413	4.8742
750	2.2732	4.9295
760	2.2903	4.9816
770	2.3226	5.0359
780	2.347	5.0936
790	2.3842	5.1492
800	2.4063	5.1918