Hydroxyapatite was studied by computer graphics. The data of structural coordinates of hydroxyapatite crystal was put into a protein graphics program in A units. The connection of each element, with what comes front and rear, was displayed by the shade-line erasing method, and the solid-image was expressed by the degree of lightness from the light source. The tint of color was drawn by Raster graphics method. A fine picture can be obtained with the program. Rotating the graphics freely in an angle around X, Y or Z axis, gives a view from any direction. Crystal graphics model of fluoridated hydroxyapatite, in which F- ions substituted in part into OH- position, was also drawn.
Computer Graphics Crystallography