...Mark I. POWNCEBY; Tim R.C. PATRICK Abstract Quenching experiments have been performed to investigate the thermal stability, solid solution limits, and selected phase relationships of SFC (silico-ferrite of calcium) within the Fe 2 O 3 -CaO-SiO 2 (FCS) system. Experiments were performed in air over...

... “Dorrite phase” Ca 2 (Fe 3+ 5 Mn 3+ 0.5 Mg 0.5 )(Si 0.5 Fe 3+ 5.5 )O 20 “Ca-silico-ferrite” Ca 4 Fe 3 + 14 (Mg,Mn) 2 Si 2 O 31 Chlormayenite-wadalite (silico-chlormayenite) Ca 12 (Al,Fe) 14 O 32 Cl 2 -Ca 12 (Al,Fe) 10 Si 4 O 32 C l6 Eltyubyuite (demidovskite) Ca 12 Fe 3 + 10 Si 4 O...

... State Commun. , 128 , 153 – 155 . Liles D.C. de Villiers J.P.R. Kahlenberg V. ( 2016 ): Refinement of iron ore sinter phases: a silico-ferrite of calcium and aluminium (SFCA) and an Al-free SFC, and the effect on phase quantification by X-ray diffraction . Mineral. Petrol. , 110...

... M.I. and Pattel R. ( 2017 ) Fundamentals of silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phase formation: effects of mill scale addition . Powder Diffraction , 32 , 85 – 89...

..., IMA2013-109; described as Ti-silicate or rhönite in Mittlefehldt et al. , 2002 ; Kurat et al. , 2004 ; Jambon and Boudouma, 2011 ; Hwang et al. , 2016 a ), and some silico-phosphates with variable SiO 2 , characteristically high FeO, and very low F and Cl contents (see table 8 in Keil, 2012...

... . Scarlett N.V.Y. Pownceby M.I. Madsen I.C. Christensen A.N. ( 2004 ): Reaction sequences in the formation of silico-ferrites of calcium and aluminum in iron ore sinter . Metall Mater. Trans. B. , 35B , 929 – 936 . Sharygin V.V. ( 2011 ): Lakargiite and minerals...

... ). The process of a complete hydrolytic decomposition of a silico-magnesian rock (less ferriferous and poorly aluminous) has led to the formation of a ferruginous material. The lower clay horizon (limonite) that overlies the weathered rock (saprolite) stands out as the most ferruginous level (54 to 75 wt.% Fe 2...

..., glass and silico ferrites of calcium and aluminium. The latter phases are abbreviated as SFCA, of which three varieties have been described depending on the molar ratio of cations to oxygen: SFCA (M 14 O 20 ), SFCA-I (M 20 O 28 ) and SFCA-II (M 26 O 36 ) (M=Ca, Fe, Al and Si). The four sinter samples...

..., a mineral analogue of the SFCA phase (silico-ferrite of calcium and aluminium), which appears in products of the calcination of iron ore at temperatures above 1200°C (Galuskina et al ., 2017b ), occurs in association with qeltite. The temperature of crystallisation of paqueite in association with iron...

... and methyl orange as the indicator. A specially designed micro-dosimeter was employed to minimize the amount of reactants, facilitating the analysis in the field. Reactive silica was measured by means of the colorimetric method involving the silico-molybdate complex (yellow form) using a portable colorimeter...

... , 1110 – 1113 . Mittal V.K. Bera S. Nithya R. Srinivasan M.P. Velmurugan S. Narasimhan S.V. ( 2004 ) Solid state synthesis of Mg-Ni ferrite and characterization by XRD and XPS . Journal of Nuclear Materials , 335 , 302 – 310 . Reguir E.P. Chakhmouradian A.R...

... fluxes (CaO, CaF 2 ) added to the alumina and iron oxide used in the reduction process. Absent from all slags investigated are Fe-bearing compounds. All of the slags are modally-dominated by prismatic crystals of β-alumina or hibonite, with a wide variety of Th-Ba-Ti-Nb-Al-oxide compounds and silico...

...(Fe,Mn) 4 (PO 4 ) 3 ] DA galileiite A rare phase in iron meteorites 57 Tsangpoite [Ca 5 (PO 4 ) 2 (SiO 4 )] DA tsangpoite A rare silico-phosphate from the D’Orbigny angrite 54 Oxides Oxide Spinel Group [(Mg,Fe 2+ )(Al,Fe 3+ ,Cr 3+ ,Ti) 2 O 4 ] Chromite (Fe 2+ Cr 2 O 4 ) DA...

... with around 4 mol% of Nd 2 O 3 (a good candidate to simulate nuclear waste encapsulation material) such crystallization can be observed directly by doing HT in situ experiments. Some silico-apatite (Ca 2 Nd 8 [SiO 4 ] 6 O 2 ) crystallized within the glass during isothermal heat treatments. A Pt-Rh10...

... conditions, part of the Na/K present is removed during the process, whereas another part may behave refractory and be retained in the clinker product. The incorporation of alkalis in main clinker minerals alite (C3S), belite (C2S), and ferrite (C4AF) is very limited. Only main clinker constituent aluminate...