456 BULLETIN 131, UNITED STATES NATIONAL MUSEUM 



Measurements of linarite from Pacific mine, Custer County 



Form 



No. Letter 



6-. 



s .. 

 TO- 

 OL - 

 U.. 

 X.. 

 t.. 



c. 



(?) 



(?) 

 (?) 



(?) 



Symbol 



Gdt. Miller 





 Ooo 

 ooO 



00 



02 



+ 10 

 +J0 



-*o 



-10 

 -13 

 +H 

 -43 



001 



010 



100 



110 



021 



101 



102 



T06 



101 



I. 5. 15 



153 



2 L 10. 5 



10. 5. 6 



Quality, description 



Very good 



Very poor 



Narrow, blurred. 



Good 



do 



Very poor 



Good 



Very poor 



Good 



do 



do. 



do. 



Poor. 



B 



159 160 



Figs. 159-160.— 159, Linarite. Pacific mine, Custer County. Oriented and lettered according 

 to Goldschmidt. Drawn with 6(010) in front. 160, Linarite. Caledonia mine, Shoshone 

 County. Oriented and lettered according to Dana. 



The measurements show a sufficient agreement to establish the 

 dentity of the mineral as well as to confirm the orientation. There 

 are four of the terminal faces, however, which do not agree with any- 

 known forms for this mineral nor do they give any simple or rational 

 indices. The approximate indices are given in the table. The 

 angles may be compared as follows: 



