Crystal Geometry Computer ProgramA program which calculates various relationships of crystal geometry was prepared in FORTRAN notation for use with the IBM-704 computer. The primary outputs are the angles between planes, and the angles between directions, that are required to construct standard stereographic projections for any of the seven crystal systems. Values are tabulated for interplanar spacing, area of the unit parallelogram on a lattice plane, and the distance between identical points along a lattice direction. The relations can be evaluated for permutations of Miller indices whose absolute values are less than or equal to 22. Redundant indices are omitted from the output. |
Common terms and phrases
ABSF absolute value Alpha Uranium Sample angles between directions angles between planes AP=BCSINA AQ=ABSING BCCOSA+TH Commission control parameters CRYSTAL GEOMETRY COMPUTER crystal structure crystal systems crystallo Data Sheet DQ=V/ABSING employee or contractor equation FORTRAN notation GAMMA GEOMETRY COMPUTER PROGRAM GO TO 79 graphic planes hikili IBM-704 computer IHH=JH+ 1 JH=0 IHH=JH+1 IKK=JK+1 JK=0 ILL=JL ILL=JL 2+1 GO ILL=JL+1 indices are omitted Input Cards input data Lattice constants lattice plane LLOYD maximum index maximum value Metallurgy Miller indices monoclinic OPERATING INSTRUCTIONS Output Sheet OUTPUT TAPE 6,5 permutations PHI and RHO plane or direction Principal Crystallographic Elements Problem title process disclosed PROGRAM by Lawrence Redundant indices reference lattice elements relations sample problem SENSE SWITCH set equal SIP=A SIQ*WI SIQ=C Source Deck standard projection standard stereographic projection tetragonal TL)=SQRTF triclinic UF SWITCH unit cell constants unit parallelogram Uranium Sample Program Values are tabulated WRITE OUTPUT TAPE