Solvation chlorites

A potentially useful method for the generation of chlorine dioxide by the pulse radiolysis of chlorite solutions suffers from the drawback that hypochlorite is also produced through the reaction of the solvated electron with chlorite [equation (23)]. This can be overcome to some extent by... 

Hayashi and Oinuma [1964] have reported dioctahedral chlorite in the alteration zone of the Kamikita mine, Japan. The (7(060) value is 1.509 A the /(OOl) value of 14.18 A is stable on heating and solvation and the intensity of the 001 reflection increases by a factor of five to six on heating at 600°C. Because the powder pattern is similar to that of Bailey and Tyler, the... 

Frenzel and Schembra [1965] have described dioctahedral chlorite from hydrothermally altered arkose in the Kaiserbach Valley. The < (001) value of 14.11 A does not change after solvation. The X-ray powder pattern is similar to those of Bailey and Tyler and of Hayashi and Oinuma, but contains impurities of quartz, dolomite, and feldspar. The (chemical analysis yields 4.80 octahedral cations plus 0.13 exchangeable cations. 

Von Engelhard et al [1962] have reported dioctahedral chlorite, mixed with quartz, kaolinite, and considerable interstratified illite-montmorillonite, in clay-marl sediments of the middle Keuper of Wurttemburg. The material does not expand on solvation. The rf(060) values for all the clay components are between 1.490 and 1.504 A. The tetrahedral Al content is 1.1 atoms, judged by the stated definitely whether the chlorite has two dioctahedral sheets or mixed di,tri-octahedral sheets. The 001 reflection at 14.23 A intensifies on heating at 550°C and decreases in spacing to 13.73 A. The interlayer material appears to be unstable, because /(OOl) decreases further to 11.9 A on heating to 700°C. 

Frank-Kamenetsky et al [1965] have given the name tosudite to a regular interstratification of dioctahedral chlorite and montmorillonite. The material has a basal spacing of 28.5 A in its natural state, increases to 32.0 A on glycerol solvation, and decreases to 23.6 A on heating. The authors describe the chlorite as dioctahedral in both sheets, but could not obtain a pure sample for chemical analysis. The fi (060) value of 1.497 A supports the view of two dioctahedral sheets, but further confirmation is desirable. 

Identification of well-crystallized chlorites by means of oriented slides in a powder diffractometer is relatively simple and straightforward. Such chlorites are characterized by a sharp, integral sequence of 00/ lines based on a repeat of / = c sin = 14.2 A. The layers do not expand on solvation with glycerol or ethylene glycol. The layers shrink only a few tenths of an angstrom on heating up to 700°C. 

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