AZURITE CRYSTALS FROM MINERAL HILL. 



285 



and in the following table these are placed alongside the 

 corresponding angles derived from the elements of Schrauf 

 and Farrington respectively; there is, it will be noticed, a 

 striking agreement between the angles for the Arizona 

 and Mineral Hill azurites. 





Angles on 



c(001). 





Form. 



Anderson. 



Farrington. 



Schrauf. 



a (100) 







87 



35 



o 



87 



37 



87 36 



m (110) 



88 



10 



88 



11 



88 10 



w (120) 



88 



47 



88 



48 



88 47 



I (023) 



30 



33 



30 



33 



30 24 



/ (OH) 



41 



31 



41 



31 



41 21 



P (021) 



60 



32 



60 



33 



60 24 



cr (101) 



44 



42 



44 



44 



44 46 



<f> (201) 



62 



14 



62 



lb 



62 18 



(101) 



47 



11 



47 



12 



47 15 



y) (302) 



58 



53 



58 



53 



58 56 



v (201) 



66 



9 



66 



8 



66 11 



P (223) 



41 



23 



41 



24 



41 21 



s (111) 



52 



30 



52 



31 



52 28 



h (221) 



68 



13 



68 



14 



68 12 



y (121) 



63 



1 



63 



2 



62 56 



k (221) 



71 



27 



71 



26 



71 25 



R (241) 



77 



27 



77 



26 



77 24 



X(l81) 



84 



15 



84 



14 



84 13 



A (2-18-3) 



79 



43 



79 



43 



79 40 





Angles on 



b (010). 





Form. 



Anderson. 



Farrington. 



Schrauf. 



m(110) 



49 25 



49 26 



4°9 38 



w (120) 



30 17 



30 17 



30 28 



h (221) 



52 50 



52 49 



53 1J 



7 (121) 



39 40 



39 40 



39 51| 



• (111) 



58 55 



58 55 



59 5 



P (223) 



64 31 



64 31 



64 40 



X (2-18-3) 



12 38 



12 38 



12 421 



E (241) 



32 32 



32 33 



32 45 



k (221) 



51 51 



51 53 



52 7 



X(481) 



30 44 



30 44 



30 571 



