Computer Supporting System for Quantitative Description of Zircon Crystal Forms
1988 Volume 1988 Issue 13 Pages 141-152
Details
1988 Volume 1988 Issue 13 Pages 141-152
Zircon crystal forms can be described quantitatively using the measurable dimensions of the crystal faces, when viewed from the direction normal to a {110} or m {100} . For each crystal placed so that the wider face of the prism is horizontal, four indexes are calculated using 22 location data: Flatness Index is the ratio of the total thickness to the total width, Elongation Index is the ratio of the height of a {110} to the sum of that height and the total width, Prism Index is the ratio of the width of m {100} to the total width of prism, and Pyramid Index is the ratio of the height of pyramid to the ideal height of u {301} . All these indexes range from 0 to 1, and are almost unchangeable depending on the two different directions of observation.
This system can be easily describe the zircon crystal form data.
Requirements: PC-9801 computer (except 96K video RAM unit) with 384K main RAM, high resolution monitor, A5 size digitizer and printer.
