THE CALCULATION OF CRYSTAL AND COUNTER SETTINGS FOR THE COLLECTION OF CRYSTALLOGRAPHIC DATA WITH A COUNTER-DIFFRACTOMETER IN THE EQUATORIAL PLANE

Formulas are developed for the angle between any two vectors lying in a plane through the origin of reciprocal space. The application of these formulas for computing the counter and crystal angles for the collection of data wfth a counter-- diffractometer in the equatorial plane is developed, and a suitable computer program, written in FORTRAN without format suitable for an IBM 1620 computer, is described. (auth)