Table 1.

Diffraction data of minerals used in the experiments and of referenced minerals

d-spacing
Pyromorphite (Dai and Hughes 1989)	Synthetic pyromorphite (this study)	Chlorapatite (Hughes et al. 1998)	Synthetic chlorapatite (this study)
4.9882	4.992	8.3121	8.348
4.3199	4.325	5.2520	5.264
4.1276	4.127	3.9163	3.924
3.7244	3.726	3.5428	3.549
3.6755	3.663	3.3880	3.391
3.3822	3.373	3.1417	3.148
3.2655	3.269	2.8502	2.855
2.9843	2.986	2.7707	2.774
2.9590	2.954	2.7678	–
2.8799	2.883	2.6260	2.630
2.4941	2.496	2.5646	2.569
2.4412	2.440	2.3054	2.308
2.2669	2.266	2.3037	–
2.1993	2.195	2.1825	2.186
2.1600	2.162	2.1448	2.148
2.0638	2.064	2.0780	2.081
2.0073	2.007	2.0436	2.046
1.9821	1.985	1.9845	1.988
1.9599	1.957	1.9581	1.961
1.9138	1.916	1.9069	1.909
1.8854	1.888	1.9060	–
1.8622	1.863	1.8356	1.837
1.8378	1.833	1.8339	1.837
1.7245	1.721	1.8139	1.816
1.6911	1.699	1.7714	1.774
1.6775	1.678	1.7507	1.752
1.6627	1.664	1.6940	1.697
1.6328	1.635	1.6618	1.664
1.6218	1.624	1.6599	–
1.6016	1.599	1.6145	1.617
1.5638	1.565	1.6134	–
1.5518	1.554	1.5997	1.602
1.5492	1.547	1.5991	–
1.5411	1.541	1.5708	1.573
1.5183	1.519	1.5569	1.559
1.5149	–	1.5303	1.532
1.4102	1.407	1.4929	1.495
1.3997	1.398	1.4911	–
1.3835	1.386	1.4579	1.460
1.3759	1.376	1.4465	1.448
1.3596	1.361	1.4453	–
1.3476	1.347	1.4251	1.428
		1.3661	1.369
		1.3395	1.336