2 
BULLETIN NO. 32. 
CRYSTALLOGRAPHY. 
Schaller states in his paper on the inyoite from the California locality 
that the species crystallizes in the monoclinic system and gives as the axial 
ratios for a: b: c: = 0*9408: 1:0*6665 (3 = 62 ° 37'. The crystals which he 
examined showed the following forms : c(001), b(010), m(110), p(lll); they 
were, however, not sufficiently bright to give good reflections, and Schaller’s 
figures are based on measurements effected with a contact goniometer. 
And in a paper published some time later A. F. Rogers gives 1 the results 
of some studies of colemanite pseudomorphs after inyoite found in Death 
Valley, California, from which he deduces the following axial ratios: 
a:b:c = 0*90:1: 0*63. /? = 65°. The pseudomorphous crystals examined by 
Rogers showed the same forms as did the inyoite examined by Schaller. 
The crystals of inyoite from Hillsborough are remarkably well developed 
and clear and, with rare exceptions, doubly terminated. They are rich in 
forms giving in most instances ’excellent reflections. It was noted, however, 
that handling with the naked fingers occasioned immediate deterioration in 
Figure 1. Gnomonic 1 projection showing distribution of faces on inyoite from Hills- 
borough, N.B. 
1 The Am. Miner, vol. 4, No. 11, Nov., 1919, pp. 135-139. 
