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I lived for 17 years at Barn Close Farm, Fritchley, Derbyshire, England, UK at the southern end of the Pennine Chain. I retired on 9/30/05 as Professor of Physical Sciences at the University of Chicag...
Maya Blue is an artificial pigment used in Pre-Columbian America, renowned for its chemical stability. The pigment can be considered a precursor of modern inclusion compounds as a hosting microporous ...
The structure, chemical composition, and properties of palygorskites from several deposits in the Russian Federation, Ukraine, Uzbekistan, and Slovakia have been investigated by transmission electron ...
Symmetry constraints and modularity:tools to model inorganic crystal structures.
Palygorskite is a Mg-rich fibrous clay, present in nature as a mixture of two intricately intertwined polymorphs –monoclinic (C2/m) and orthorhombic (Pbmn) –characterized by the presence of channels a...
Abstract: The clay particles in a kaolin deposit from Brazil were investigated by X-ray diffraction (XRD), differential thermal analysis (DTA), analytical transmission electron microscopy (ATEM), and ...
Abstract: A synthetic octahedral-site-vacancy-free annite sample and its progressive oxidation, induced by heating in air, were studied by powder X-ray diffraction (pXRD), Mössbauer spectroscopy,...
Abstract: The three-dimensional crystal structures of illite-smectite (I-S) in K-bentonite samples from the Appalachian Basin are characterized by rotational disorder in the stacking sequence of 2:1 i...
Abstract: The crystal structure of cronstedtite-1T was refined in space group P31m, using two crystals: a triangular tabular crystal from Herja, Romania and a conical crystal from Lostwithiel, Cornwal...
Abstract: A new occurrence of destinezite (diadochite), ideally Fe2(PO4)(SO4)(OH)·6H2O, is described from Alum Cave Bluff, Great Smoky Mountains National Park, Tennessee, where it occurs in soil and i...
Bederite, ideally Ca Mn Fe Mn (PO ) (H O) , orthorhombic, a = 12.559(2), b = 12.834(1), c= 11.714(2) ?, V = 1887.8(4) ? , Z = 4, space group Pcab, is a new mineral from the El Pe?(R)AE pegmatite, Ne...
Chromian clinochlore-IIb-4 (triclinic) and IIb-2 (monoclinic) polytypes from the Day Book Body, North Carolina, were heated to 650 ?C for 5 hours and air quenched. Single-crystal X-ray refinements o...
Abstract: The crystal structure of single crystals of kaolinite from Keokuk, Iowa, was refined using data measured at the microfocus X-ray beamline at the ESRE Grenoble, France (λ = 0.6883, T = room t...
Kanemite was studied by single-crystal X-ray diffraction. The mineral, ideally NaHSi O °§3 O,2 5 2 is orthorhombic (space group Pbcn); unit-cell parameters are a = 4.946(3), b = 20.502(15), c = 7.275...

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