... are not listed in Shannon (1976) . b 4SQ indicates a square planar coordination. 1 The special case with c = 2.26 determined by Eggleton (1991) and used extensively in this study, will be referred to as the Anderson-Eggleton (AE) relationship. These relations have been discussed by Larsen...

... (2016) : Refractive index total electronic polarizabilities refractive-index calculation Anderson-Eggleton relationship Gladstone-Dale relationship computer program Refractive indices n are routinely used to describe the properties of minerals and other transparent compounds...

... minerals ( Anand et al. , 1985 ), presence or absence of secondary minerals ( Mazer et al. , 1992 ), and the orientation of secondary minerals in relation to the parent minerals ( Eggleton and Boland, 1982 ; LeGleuher et al. , 1990 ; Banfield and Barker, 1994 ). Solution properties in voids...

... structure, and unit-cell dimensions are known. Five-coordinated Ti 4+ and vanadyl electronic polarizabilities were determined using the Anderson-Eggleton relation. Although other ions, such as Mn 2+ , Fe 2+ , Fe 3+ , and Zr 4+ , show regular polarizability-CN behavior, [5]-coordinated Ti 4+ and vanadyl...

..., but the contact is not clearly defined due to thick vegetation and soil. According to the geology of the Dromedary area studied by Boesen & Joplin (1972) , Eggleton (1987) and Smith et al. (1988) , the pyroxenite is part of the pyroxenite suite, a small fraction in the Dromedary plutonic complex...

... substitution SiH –4 . The cronstedtite exchange requires charge and size balance across nearest-neighbor T and O crystal sites, suggesting crystal-interior rather than crystal-surface control. Ferrihydrite’s composition reflects time- and space-related variations in the chemical potentials of components...

... ) to yield a unique set of individual electronic polarizabilities of ions, which can be used for the interpretation of optical properties. Various definitions of polarizabilities have been proposed, but we use the Anderson-Eggleton relationship ( Anderson 1975 ; Eggleton 1991 ) discussed in Shannon...

... <α AE >, and finally the reference to the refractive indices for all 2946 entries. The total polarizability of a mineral, <α AE >, is a useful property that reflects its composition, crystal structure, and chemistry and was calculated using the Anderson-Eggleton relationship α AE = ( n D 2...

.... Systematic evaluations would enhance our understanding of the ore-forming mechanism. Hillslope processes also lead to REE redistribution ( Thomas, 1994 ; Taylor and Eggleton, 2001 ; Schaetzl and Anderson, 2005 ; Schaetzl, 2013 ). In tropical and subtropical environments, a convex-concave hillslope...

... of lizardite-1 T and 2 H 1 were presented by Guggenheim and Zhan (1998) . The greenalite structure was described by Guggenheim and Eggleton (1998) . The diffraction patterns of cronstedtite (and of related structures such as lizardite and amesite) can be subdivided into two groups: reflections...

... ( Bolland et al . 1976 ; Ma & Eggleton 1999 ). Metals released from primary hosts either are inherited in the secondary minerals, migrate and are scavenged by secondary minerals or are lost in solution from the weathering profile. In the saprolite, trace elements directly related to the Cu-Au...

...David B. Tilley; Richard A. Eggleton Abstract A pseudomorphous aggregate after titanite composed of smectite, anatase and residual titanite of composition (Ca 0.98 , Mn 0.02 )(Ti 0.65 , Al 0.35 )[SiO 4 ](O 0.65 , OH 0.35 ), from a depth of 450 m in the Broken Hill South Mine, New South Wales...

... and Simonson, 1985 ; Eggleton et al., 1987 ). Joussein (2016) and Vitousek et al. (2007) suggested that soil mineralogy ripens through a series of steps from allophane or imogolite to halloysite and finally kaolinite on a time frame of ∼1 m.y. Clearly, the weathering of parental basalt to an assemblage...

... influenced the propagation of fractures during physical weathering, whereas finer scale corrugations form due to compositional or strain-related differences in dissolution rates of albite platelets and enclosing tweed orthoclase. With progressive weathering, etch pits that initiated at the grain surface...

... enlargement is related to an increase in octahedral flattening and a decrease in O sheet thickness. The % O enlargement vs R plot is another graphic representation of the R vs b plot that can be useful to discuss the variations in O sheet dimensions (Guggenheim & Eggleton, 1987 ) and O sheet...

... in the tetrahedra sheet : Canadian Mineralogist , v. 36 , p. 163 – 179 . Guggenheim , S. , Bailey , S. , Eggleton , R. , Wilkes , P. , 1982 , Structural aspects of greenalite and related minerals : Canadian Mineralogist , v. 20 , p. 1 – 18 . Hamade , T. , Konhauser , K.O...

... ; Němec 1983a ; Eggleton and Ashley 1989 ; Menzies and Boggs 1993 ; Abdalla et al. 1996 ; Förster et al. 2005 ). Crystal-structure data are limited or missing. The crystal-structure refinements of holotype masutomilite ( Mizota et al. 1986 ) and norrishite ( Tyrna and Guggenheim 1991 ) represent two...

... important than crystallinity. The high cation exchange capacity (CEC) found in some kaolinites was due to smectite layers on the surface of the kaolinite crystals ( Chi Ma and Eggleton, 1999 ). Both permanent and variable charge sites on mineral surfaces are heterogeneous. Based on the IR spectra of NH 4...

... are of geomorphological significance or achieve economic relevance, such as laterites or bauxites ( Taylor and Eggleton 2001 ; Boyle 2003 ; Arancibia et al. 2006 ; Dixon and McLaren 2009 ). And a very specific type of supergene enrichment takes place under tropical climatic conditions on Co- and Ni-enriched parent...

... , E. , and Gooday , A.J. , 1996 , Cenozoic deep-sea benthic foraminifers; tracers for changes in oceanic productivity? : Geology , 24 . 355 – 358 . Thompson , R.S. , Anderson , K.H. , and Bartlein , P.J. , 1999 , Atlas of relations between climatic parameters...