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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 ...
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 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...
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...
Aluminum-rich titanites [Ca(Ti,Al)(O,F)SiO ] with X > 0.53 [X = Al/(Al+Ti)], including the pure end-member CaAlFSiOwere synthesized for the first time in a high-pressure experimental was determined...
Incommensurate modulation in ganophyllite crystals was investigated with selected-area electron diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), analytical elec- tron mi...
Boralsilite, Al B Si O , is monoclinic, space group C2/m, with a = 14.767(1), b = 5.574(1), c = 15.079(1) ?, ? = 91.96(1)?, and Z = 2. The structure was solved with direct methods and refined to an ...
Synthetic nagyagite was grown from a melt as part of a search for materials with high-tempera- ture superconductivity. Electron microprobe analyses of synthetic nagyagite and of nagyagite from the t...
The crystal structure of a potassic richterite, K(KCa)Mg Si O (OH) synthesized at 15 GPa and 1400 ?C, was refined from single-crystal X-ray diffraction data. The unit-cell parameters are: a = 10.192...
ThecrystalstructureofgillulyiteTl (As,Sb) S wasreinterpretedbasedontheaverage structuredeterminedbyFoitetal.(1995).ItconsistsofalternatingPbS-likeslabscom- prisedofAs-SpolyhedraandTl-bearingslabswit...
Rossmanite is a new tourmaline species from near Rozˇna´, western Moravia, Czech Republic. It forms pale pink columnar crystals about 25 mm long and 5 mm thick, elon-gated along c with striation...
Phase egg, first described by Eggleton et al. (1978), was synthesized and its composition determined to be AlSiO3OH. The crystal structure of AlSiO3OH, including the position of the hydrogen, has been...

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