PURE SCIENCE 
8 Crystallograf 
54 y General; 08Te of y mineral belong with that mineral; e.g. 
cleavage of borates 549.73 
Systems of crystallization 
Twin crystals Crystallin aggregations 
Cleavage Isomorfism Polymorfism 
Irregularities Internal imperfections 
Formation and growth of crystals 
Pseudomorfs 
Mathematic: mesurement of angles 
Physical 
Optical 
Mineralo 
.01 Philosofy, L0gy .02 Compends .03 Dictionaries .04 Essays, papers. 
atc. .05 Periodicals .06 Societies .07 Study and teaching, museums .08 Col- 
lectiv works .09 History 
Determinativ Blowpiping 
See also 543.6 Methods of analysis of rocks and ores 
See 542.53 Blowpipes and their manipulation. For other relations see Blow- 
piping in Relativ index following Tables 
Nativ elements : 
Sulfids, tellurids, selenids, arsenids, antimonids, bismuthids 
Compounds of chlorin, bromin, iodin, and fluorin 
Oxygen compounds: oxids 
Silicates 
Anhydrous 
Hydrous 
“ther ternary oxygen compounds 
Tantalates Columbates 
Phosphates ~~ Arsenates  Vanadates  Antimonates 
Nitrates 
Borates 
Tungstates =~ Molybdates Chromates 
Anhydrous sulfates 
Hydrous sulfates 
Tellurates 
Carbonates 
Oxalates 
Hydrocarbons 
Occurrence as minerals. 
economic geology see 553 
Geografic distribution 
Nivided like o4G-000 
A