Garnets - decomposition

The elements for which the results can be underestimated because of an incomplete digestion of refractory accessory minerals such as zircon and garnet, and/or formation of insoluble fluoride complexes have been distinguished. Recommendations on the choice of the decomposition procedure for such samples are given. 

Thermal Decomposition of LA has been the subject of study by a large number of investigators Hitch (Ref 17) found LA extremely hard to decomp without explg. Garnet Gomm (Ref 44) in studying the rate of de-... 

F. A. H. Scbreinemakers could not prepare lithium tetrachromate, Li2Cr40is but be showed that sodium tetrachromate, Na2Cr40i3.H20, can exist under the conditions indicated in Fig. 34. F. Mylius and R. Funk prepared this salt by evaporating a soln. of sodium chromate in an excess of chromic acid. Tbe garnet-red, deliquescent plates melt at 40°-50° with tbe separation of chromium trioxide. Tbe salt dissolves in water without decomposition. A sat. soln. at 18° has 74-60 per cent, of Na2Cr40i3, and has a sp. gr. of 1-926 and at 0°, 16°, and 22°, tbe respective percentage solubilities are 72-19, 74-19, and 76-01. 

Kitaoka K., Koznka H., Yoke T. Preparation of lead lanthannm zirconate titanate (PLZT, (Pb,La)(Zr,Ti)03) fibers by sol-gel method. J. Am. Ceram. Soc. 1998 81 1189-1196 Koznka H., Knroki H., Sakka S. Flow characteristics and spinnability of sols prepared from silicon alkoxide solntion. J. Non-Cryst. Solids 1988 100 226-230 Kmger R., Glanbitt W., Lobmann P. Strnctnre evolntion in sol-gel-derived yttrium aluminum garnet-alumina precursor fibers. J. Am. Ceram. Soc. 2002 85 2827-2833 Kurokawa H., Ohta H., Sato T. Preparation of carbide fibres by thermal decomposition ofceUulose-metal (Ti, Zr) alkoxide gel fibres. J. Mater. Sci. Lett. 1994 13 516-518 Knrokawa Y., Ishizaki T., Suzuki M. Preparation of refractory nitride fibers by thermal decomposition of transition metal (Ti, Nb) alkoxide-cellnlose preenrsor gel fibres in NH3 atmosphere. J. Mater. Sci. 2001 36 301-306... 

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