EPPECT OP SODIUM, IRON IONS AXD TIME OP (STIRRING) ON THE CRYSTAL-LATTICE AXD MORPHOLOGY OF THE GYPSUM CRYSTALS.

EPPECT OP SODIUM, IRON IONS AXD TIME OP (STIRRING)
ON THE CRYSTAL-LATTICE AXD MORPHOLOGY
OF THE GYPSUM CRYSTALS.
M. A. SHATAa
, AND s.r. HAMDONA,
ational Institute of Oceanography and Fisheries, Anfoushy, Alexandria, Egypt.
eT Words: Crystal lattice, Morphology, Sodium, Iron, Stirring time.
ABSTRACT
The influence of the presence of Na+ and Fe++ ions on the
crystal-lattice and – morphology of gypsum crystals has been
investigated. Generally, the degree of crystallinity is affected by
the replacement of Ca·· by metal ions. The replacement and the
partial deformation of crystal is more in case of incorporated Na·
than that of Fe·· ions. The minimum allowed concentration of Na· as
impurities in the gypsum must not exceeds 4\ to obtain ideal gypsum
crystals. Also the effect of different stirring time was examined. The
change in stirring time results in irregular crystal faces of gypsum
crystals.