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General Phyllotungstite Information ... Search for Phyllotungstite Images ... Phyllotungstite Crystallography...
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Structural and chemical similarities to Pittongite . Formula revised by Grey et al. (2006).
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Phyllotungstite HCaFe3+; 3 (WO4)6 •10H2O; c 2001-2005 Mineral Data Publishing, version 1; Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m, mm2, or 222. Crystals are flattened on {001}, to 0.25 mm, showing {100}, {010}, {110}, {001}, in radial aggregates and scaly crusts.
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The similarity of the powder-diffraction patterns for pittongite and phyllotungstite, CaFe3+3H(WO4)6·10H2O ...
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Pittongite has structural and chemical similarities to phyllotungstite, CaFe3+. 3H(WO4)6•10H2O. ..... phyllotungstite is discussed in more detail by Grey et ...
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Pittongite and phyllotungstite represent two different intergrowth sequences, or polytypes. ... Phyllotungstite is reported to have orthorhombic symmetry, ...
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In phyllotungstite, the (111)py blocks have the same thickness, 6 Å, whereas pittongite contains pyrochlore blocks of two different thicknesses, 6 and 12 Å. The structures can alternatively be described in terms of chemical twinning of the pyrochlore structure on (111)py oxygen planes.
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PHYLLOTUNGSTITE. History / Historique. Authors/Auteurs (inventeurs) : WALENTA; Discovery date/Date de découverte : 1984; Etymology/Etymologie : Du grec ...
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Phyllotungstite (A=predominantly Ca) is hexagonal, a=7.31(3)A, c=19.55(1)A, ... In phyllotungstite, the (111){sub py} blocks have the same thickness, 6A, ...
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At Mont St. Hilaire, doyleite occursas rosettesof platy crystals refractive index 1.73-1.74, high birefringence.No fluowith calcite and pyrite in a vug in albitite veins in nepheline Mean rescence under ultraviolet light. ... The polymorarsenate analogue of goyazite, is a new mineral of secondary ... The color is pinkish violet;
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