MASTER 6I n t h e presence of 1M -NaNO f r e s h l y p r e c i p i t a t e d i r o n hydrous oxide 3 '. . 7g e l suspensions (0.093~ .. . Fe) s e l e c t i v e l y adsorbed C a and Zn over a w i d e conL c e n t~a t i p n range. Adsorption.was highly pH. dependent Department of Energy c o n t r a c t EY-76-S-02-1515 and DE-AS02-76 EVD-1515-~a c k s o n (Paper COO-1515-81); through ad I n t . Cons. ' f o r J n t e r i n s t i t u t i o n a l. Coop. i n t h e

The clay fraction of four soils derived from Pleistocene basalt in Victoria, under a Mediterranean type climate, have been studied by X-ray diffraction, differential thermal, infrared, and electron microscopic techniques. Their chemical dissolution with alkali has shown that they contain about 25 % of allophane having a SiO2/Al2O3 molar ratio of about 4. This ratio is higher than that reported for sesquioxidic allophane and halloysitic allophane, and the name 'siliceous allophane' is proposed.

Dust s torms have long been of interest to mankind. "Dry fog" in parts of Australia, sirocco dust storms of the Sahara, harmatan haze in northern and central Africa, and "red rains" (reddish dust carried in rain fall) of Europe caught the attention of men in historic times, while extensive loess (silt) and dune sand and soils formed thereon have received scientific attention.in U.

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