Results 171 to 180 of about 19,667 (226)
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Nature, 1948
X-RAY examination of monazite has been carried out by Hadding1, Gliszczynski2 and Parrish3, and the space group and crystal class uniquely determined. According to Goldschmidt4, the thorium which is usually present is ‘‘captured during crystallization of the phosphate from its parent magma because of its favourable ionic size.
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X-RAY examination of monazite has been carried out by Hadding1, Gliszczynski2 and Parrish3, and the space group and crystal class uniquely determined. According to Goldschmidt4, the thorium which is usually present is ‘‘captured during crystallization of the phosphate from its parent magma because of its favourable ionic size.
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Chemical Geology, 2008
Abstract Diffusion of Th has been characterized in synthetic monazite under dry conditions. The synthetic monazites (either pure CePO4, NdPO4, or a mixed LREE phosphate containing Ce, Nd, and Sm) were grown via a Na2CO3–MoO3 flux method. The sources of diffusant for the experiments were either synthesized ThSiO4 or CaTh(PO4)2 powders mixed with CePO4.
D.J. Cherniak, J.M. Pyle
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Abstract Diffusion of Th has been characterized in synthetic monazite under dry conditions. The synthetic monazites (either pure CePO4, NdPO4, or a mixed LREE phosphate containing Ce, Nd, and Sm) were grown via a Na2CO3–MoO3 flux method. The sources of diffusant for the experiments were either synthesized ThSiO4 or CaTh(PO4)2 powders mixed with CePO4.
D.J. Cherniak, J.M. Pyle
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Deformation twinning in monazite
Acta Materialia, 2003Abstract Polycrystalline monazite (LaPO4) was deformed at room temperature by a spherical indenter. Deformation twins were identified by TEM in 70 grains. Five twin planes were found: (1 0 0) was by far the most common; (0 0 1) and (1 2 0) were less common; ( 1 2 2 ) was rare, and kinks in (1 2 0) twins were identified as irrational ′(
R.S Hay, D.B Marshall
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Controlled leaching of monazites
Journal of Geophysical Research, 1967The difficulties of obtaining a clear-cut geological interpretation of calculated isotopic ages are often increased by the presence of discordant age patterns. Although such patterns have been reported for most uranium-thorium bearing minerals, age determinations on monazites may exhibit distinctly more pronounced discrepancies.
A. J. Burger +2 more
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Monazite-Xenotime-Garnet Equilibrium in Metapelites and a New Monazite-Garnet Thermometer
Journal of Petrology, 2001Prograde suites of pelitic rocks were examined with electron microprobe INTRODUCTION and laser ablation inductively coupled plasma mass spectrometry to Monazite [(Ce,La,Th)PO4] plays an important role in determine the systematics of element partitioning between coexisting studies of igneous and metamorphic petrogenesis.
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The genesis of grey monazite [PDF]
, 1994 Grey monazite occurs as sub-millimetre sized, ellipsoidal, authigenic concretions in Llanvirn-aged shales of the Calymene Formation, Montes de Toledo area, Central Spain. The nodules are similar to those previously described from Palaeozoic shales in Wales, Brittany and Belgium. They are Eu-rich and poor in Th by comparison with igneous monazites. They
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