1-20 OF 94 RESULTS FOR

phlogopite-2O

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 April 1994
American Mineralogist (1994) 79 (3-4): 289-301.
...Giuseppe Cruciani; Pier Francesco Zanazzi Abstract The crystal chemistry of 1 M phlogopite was studied by single-crystal X-ray diffraction and microprobe analysis. Structural refinement was carried out in space group C 2/ m ( R values between 0.021 and 0.052) on 24 samples from basic lamproites...
Journal Article
Published: 01 February 2008
American Mineralogist (2008) 93 (2-3): 426-437.
...%), phlogopite (8.9%), and magnetite (6.3%). The micas were studied using chemical (EPMA, C-H-N, SIMS), structural (SCXRD), and spectroscopic (Mössbauer) methods. EPMA of 36 crystals from thin sections and 6 discrete crystals selected for the structural analysis showed remarkable compositional variability...
FIGURES | View All (5)
Journal Article
Published: 01 October 2007
Mineralogical Magazine (2007) 71 (5): 519-537.
... subsynthems and clustered into the Barile Synthem. In the present investigation, trioctahedral micas from the uppermost units (the Ventaruolo Subsynthem) of the Barile Synthem are considered. The samples are labelled VUT187. The phlogopitic micas were separated from the host rock (an olivine-foidite...
FIGURES | View All (6)
Journal Article
Published: 01 July 2007
American Mineralogist (2007) 92 (7): 1158-1164.
... is satisfactorily described by a constant value resulting in 37(2) 10 −6 K −1 . Mössbauer spectroscopy proves that REDOX reactions have occurred upon heating, presumably 2(OH − + Fe 2+ ) → 2O 2− + 2Fe 3+ + H 2 ↑ and/or 4Fe 2+ + 2OH − + O 2 → 4Fe 3+ + 3O 2− + H 2 O. On the basis of the elastic and thermal...
FIGURES | View All (8)
Journal Article
Published: 01 November 2010
American Mineralogist (2010) 95 (11-12): 1657-1670.
...F. Scordari; M.D. Dyar; E. Schingaro; M. Lacalamita; L. Ottolini Abstract Selected phlogopite flakes from Mt. Vulture in southern Italy were studied using a combination of single-crystal techniques: electron microprobe analysis (EMPA), secondary ion mass spectrometry (SIMS), single-crystal X-ray...
FIGURES | View All (8)
Journal Article
Published: 01 April 2009
European Journal of Mineralogy (2009) 21 (2): 397-406.
...Olivier Namur; Frédéric Hatert; Fernande Grandjean; Gary J. Long; Natacha Krins; André-Mathieu Fransolet; Jacqueline Vander Auwera; Bernard Charlier Abstract Intercumulus titanian phlogopite occurs in leuco- and gabbronoritic cumulates from the Suwalki anorthosite massif, NE Poland. The degree...
FIGURES | View All (4)
Journal Article
Published: 01 May 2000
American Mineralogist (2000) 85 (5-6): 753-759.
...David Virgo; Robert k. Popp Abstract The substitution mechanisms of Fe and Ti have been determined in phlogopite megacrysts from an ultramafic lamprophyre dyke from the Okenyenya igneous complex, northwestern Namibia. Mica separates were heat-treated from 800 to 900 °C, 1 atm to 10 kbar, and f H 2...
FIGURES
Published: 01 January 2013
DOI: 10.1180/DHZ.22
EISBN: 9780903056434
... The micas as a whole show considerable variation in chemical and physical properties, but all are characterized by a platy morphology and perfect basal cleavage which is a consequence of their layered atomic structure. Of the micas, muscovite, phlogopite-biotite and lepidolite...
FIGURES | View All (6)
Journal Article
Published: 01 April 2005
Clays and Clay Minerals (2005) 53 (2): 179-189.
... *, the difference <K–O> outer −<K–O> inner ) support the occurrence of the Ti-oxy substitution ( VI R 2+ + 2(OH) − ⇌ VI Ti 4+ + 2O 2− + H 2 ) in the sample. Analysis of structural distortions as a function of the Ti content revealed that the positions of the oxygens O3 and O4 are displaced in opposite...
FIGURES | View All (7)
Journal Article
Published: 01 November 1977
Journal of the Geological Society (1977) 134 (2): 215-234.
.... The compositions of near-solidus mantle magmas are strongly influenced by H 2 O/CO 2 and by the distribution of carbonate, amphibole and phlogopite in the peridotite. The normal product of crustal anatexis is H 2 O-under-saturated granitic liquid. Tonalite liquids can-not be produced by crustal anatexis during...
Journal Article
Published: 01 May 2011
American Mineralogist (2011) 96 (5-6): 732-743.
... to 2.01 ≤ R 1 ≤ 3.51, 2.00 ≤ wR 2 ≤ 3.51%. The micas have no VI Al 3+ and Na is probably partitioned over both interlayer and octahedral sites. Major substitutions are OH − ↔ F − , and the Ti-oxy substitution: VI M 2+ + 2(OH) − ↔ VI Ti 4+ + 2O 2− + H 2 ↑. Accordingly, the structural features...
FIGURES | View All (10)
Journal Article
Published: 01 June 2012
European Journal of Mineralogy (2012) 24 (3): 527-533.
... ), which exhibit remarkable amounts of Ba (>900 ppm) partitioned in nepheline (0.10 wt%), calcite (0.50 wt%), apatite (up to 0.18 wt%), and micas (>10 wt%) of the phlogopite-annite solid solution series. Among trioctahedral micas, kinoshitalite shows the highest content of barium (up to 29 wt%; Gnos...
FIGURES
Series: Society of Economic Geologists
Published: 01 January 2017
DOI: 10.5382/Rev.19.09
EISBN: 9781629491172
FIGURES | View All (24)
Published: 01 January 2013
DOI: 10.1180/DHZ.25
EISBN: 9780903056434
... another across the interlayer gap rather than being directly superimposed as in the micas. Small rotations of the tetrahedra cause the six-membered rings to be di-trigonal rather than hexagonal. One-layered triclinic (Tc), two-layered monoclinic (2M) and two-layered orthorhombic (2O) polytypes have been...
FIGURES | View All (4)
Journal Article
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 1017-1025.
... parameters in the ranges a = 5.323–5.324, b = 9.219–9.222, c = 10.116–10.119 Å, β = 100.1–100.3°. Major substitutions are OH − ↔ F − ,M 3+ -oxy ( VI M 2+ +OH − ↔ VI M 3+ +O 2− ) and Ti-oxy substitution: VI M 2+ +2(OH) − ↔ VI Ti 4+ +2O 2− . The fluorophlogopite from Piano delle Concazze exhibits the shortest...
FIGURES | View All (8)
Journal Article
Published: 01 May 2006
European Journal of Mineralogy (2006) 18 (3): 379-391.
... (Si and Ca), rutile (Ti), corundum (Al), magnetite (Fe), orthoclase (K), barite (Ba), fluor-phlogopite (F), sylvite (Cl). Acquisition was done following the procedure of Foley (1989) ; data reduction was done by the PAP method ( Pouchou & Pichoir, 1985 ). Single-crystal X-ray data...
FIGURES | View All (5)
Journal Article
Published: 01 August 2015
European Journal of Mineralogy (2015) 27 (4): 521-533.
...Victor V. Sharygin Abstract Hendricksite, Zn-Mn-bearing fluorophlogopite and phlogopite were observed in the groundmass of two types of peralkaline phonolite from the Oktyabrsky massif, eastern Azov Sea region, Ukraine. These micas are associated with nepheline, potassium feldspar, albite, sodalite...
FIGURES | View All (8)
Journal Article
Published: 01 January 2006
American Mineralogist (2006) 91 (1): 182-190.
...) − ↔ VI Ti 4+ + 2O 2− + H 2 (Ti-oxy substitution) This latter substitution is more common than previously suspected in magmatic and metamorphic phlogopites, as determined by recent multi-methodic studies ( Virgo and Popp 2000 ; Righter et al. 2002 ; Cesare et al. 2003 ; Kogarko et al. 2005...
FIGURES | View All (4)
Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 1023-1032.
...Anton R. Chakhmouradian; Roger H. Mitchell; Peter C. Burns; Yulia Mikhailova; Ekaterina P. Reguir Abstract On trouve la marianoïte, nouveau membre du groupe de la cuspidine, dans une silicocarbonatite à phlogopite + calcite dans la partie occidentale du complexe intrusif de Prairie Lake, dans le...
FIGURES | View All (7)
Journal Article
Published: 01 August 2014
Clays and Clay Minerals (2014) 62 (4): 243-252.
.... a tetra-ferriphlogopite from an alkaline-carbonatitic complex near Tapira, Belo Horizonte, Minas Gerais, Brazil, and an Fe 2+ -bearing phlogopite containing less tetrahedral Fe 3+ from the Kovdor carbonatite-bearing, alkaline-ultrabasic complex, Kola Peninsula, Russia, are explored here. Mineral-surface...
FIGURES | View All (5)