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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 74 



These crystals vary gradually to the general type shown in Figure 

 3, in which the front pinacoid is reduced to a small face and the 

 crystal is distinctly tabular parallel to the basal pinacoid c (001). 

 The crystal of this type measured gave the angles: 



^ -^ 



Fig. 3.— Crystal of miaroyrite tabular on c (001) 

 Measurements of miargyrite crystal, Figure 3. (Lab. No. 



1992) 



