Page 441 - Copper and Bronze in Art: Corrosion, Colorants, Getty Museum Conservation, By David Scott

X-Ray Diffraction Studies

A P P E N D I X J)

T A B L E 1 X-RAY DIFFRACTION DATA FOR THE SYNTHESIS OF A CHINESE RECIPE
USING CUPRITE DISSOLVED IN ALUM TO WHICH A SOLUTION OF NATRON
IS ADDED, COMPARED WITH CHALCONATRONITE (ICDD 22-1458)

Cu 2 0 + ALUM CHALCONATRONITE Cu 2 0 + ALUM CHALCONATRONITE
AND NATRON Na 2 Cu(C0 3 ) 2 -3H 2 0 AND NATRON Na 2 Cu(C0 3 ) 2 -3H 2 0
(synthetic mixture of (ICDD 22-1458) (synthetic mixture of (ICDD 22-1458)
Na 2 C0 3 , NaCI, and Na 2 S0 4 ) Na 2 C0 3 , NaCI, and Na 2 S0 4 )
continued
Intensity d-spacing d-spacing Intensity Intensity d-spacing d-spacing Intensity

8.06 30 3.37 40
7.82 50 3.29 10
100 7.0 6.90 100 3.17 20
5.59 40 3.12 40
50 5.28 5.18 70 3.04 10
4.85 30 3.00 50
4.81 30 2.98 40
4.57 40 2.91 50
50 4.25 4.21 40 2.89 60
4.18 80 2.852 70
4.10 50 10 2.846 2.847 50
4.05 20 more d-values
3.91 30 10 2.595 2.590 20
3.80 30 more d-values
20 3.70 3.68 90 10 2.438 2.430 60
3.63 40 more d-values
3.45 40 1.800 40
3.41 30