Löslichkeit und Korngröße. I

Solubility of Fine Particles of Strontium Sulfate

“…Interfacial Tension.-Substituting v = 2, a = 7.0 (section 3,d) for SrS04 and the values of the other constants in eq. 15, from (15) and ( 17) we obtain 7 = 84 ± 8 erg. cm.…”

“…At 50% methanol concentration fine particles are formed abundantly in ca. 15 seconds with no formation of large crystals. At methanol concentrations higher than 50%, the higher the methanol concentration the smaller the particles formed.…”

“…Pu + (2AIa)/(3p) y/xyf + vli'T 111 a (13) When x is effectively large, the second term in the left hand side of (13) vanishes and the saturation activity a assumes its normal value a0 given by pu = yu' + vRT In ao (14) Finally, from (13) and ( 14) we obtain Log a/au = (2/'3Alccy)/(2.303v RT px) (15) If the geometry of the crystal is known a can easily be calculated since, as will be seen from ( 4), ( 5) and (11), it is the ratio of the total surface area to the volume of a crystal of unit x. For instance, for a cube, if x is the length of one edge, a = 6.…”