INDEX magnetite

The separation indexes of magnetite using the above two polymer complexes collectors are better than those using individual NaLS or LAHCL. 

Pig. 7.31 Phase analysis of a technical catalyst precursor for ammonia synthesis K = KHC03, C = CaFe306, M = magnetite (Magnetite reflections are indexed in the upper diagram)... 

Miller index Pure magnetite Magnetite precursor Miller index Piu-e magnetite Magnetite precursor... 

Iron group Iron oxides and lydroxides group Zinc group Iron zinc oxide Calcite Jacobsite Magnetite Zincite Zinc oxide Colour Index (1971) 77496,77950 Rutley (1988) 282-283... 

Schweppe (1992) describes iron oxide black as a very deep colour of black produced, in ancient Mesopotamia and Minoan Crete, by heating iron oxide derived from clays and ochres to 800-1100°C. It is unclear as to whether this was used in this context as anything other than a fired glaze on ceramics. According to Mayer (1991), black oxide of iron is a synonym for a black synthetic iron oxide pigment if so, then probably this would be magnetite. An iron black is also referred to by the Colour Index (1971) however, this is described in that source as being a form of precipitated antimony. 

The swelling index is firstly increased and then decreased with the increase of reduction time and reduction extent, which can be ascribed to the disruptive stresses induced during the transformation of hematite to magnetite. At 1050 °C, when reduction extent is about 50 %, the maximum swelling index can be obtained. The maximum swelling index is increased with the increase of reduction temperature and CO content. 

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