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phlogopite-1M

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The structure of <b>phlogopite</b> <b>1M</b>, KMg 3 AlSi 3 O 10 (OH) 2  is monoclinic  C ...
Published: 01 January 2006
Figure 5. The structure of phlogopite 1M, KMg 3 AlSi 3 O 10 (OH) 2 is monoclinic C 2/ m . One third of the Si atoms in the tetrahedral layer are replaced by Al and charge-balanced by the interlayer K atoms (gray sphere). Muscovite, KMg 3 AlSi 3 O 10 (OH) 2 , is similar except that one third
Journal Article
Published: 01 October 1997
American Mineralogist (1997) 82 (9-10): 936-945.
... of characterizing some aspects of their crystal chemistry and their relationships with closely associated phlogopite-1 M . In the clintonite samples examined, the tetrahedral composition ranges from Si 1.19 Al 2.78 Fe 0.03 to Si 1.28 Al 2.70 Fe 0.02 , indicating that the extent of the exchange vector [4] Al –1 [6...
Journal Article
Published: 01 June 1999
American Mineralogist (1999) 84 (5-6): 778-781.
...Frank C. Hawthorne; David K. Teertstra; Petr Cerny Abstract The crystal structure of a rubidian cesian phlogopite-1M from pegmatite exocontacts at Red Cross Lake, Manitoba, monoclinic, a = 5.343(1), b = 9.247(2), c = 10.397(3) Aa, beta = 100.04(2) degrees , V = 505.8(2) Aa 3 , has been refined...
Journal Article
Published: 01 November 2002
European Journal of Mineralogy (2002) 14 (6): 1129-1138.
.... Celsian and cymrite formed as additional phases in the runs of the (K-Ba)-series. The synthetic phlogopitic micas often consist of mixtures of the three polytypes 1M, 2M 1 and 2M 2 , with 1M being the most abundant polytype. Based on electron microprobe analyses, interlayer vacancy concentrations of up...
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Journal Article
Published: 01 December 2018
American Mineralogist (2018) 103 (12): 1999-2010.
... and geochemical data suggest the existence of different types of cumulate rocks as carbonatites (calcio- and ferrocarbonatites in Catalão II; magnesiocarbonatites in Catalão I), magnetitites, apatitites, and phlogopitites. In Catalão II complex the presence of ultra-mafic lamprophyres (phlogopite-picrites...
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Journal Article
Published: 01 April 1998
American Mineralogist (1998) 83 (3-4): 193-204.
... equilibrated with product and reactant assemblages. Synthetic 1M phlogopite [KMg 3 AlSi 3 O 10 (OH) 2 ] and enstatite (MgSiO 3 ) maintained end-member stoichiometry throughout, and the potassium feldspar (KAlSi 3 O 8 ) was a high sanidine, based on unit-cell refinements. The broad P-T-XH 2 O and narrow...
Journal Article
Published: 01 April 1964
American Mineralogist (1964) 49 (3-4): 348-362.
... the phlogopite polytype, only the 1M variety being formed, but does lower the decomposition temperature about 100° C. The phlogopite decomposition curve found in this investigation (1120° C. at 10,000 psi), appears to be about 100° C. above the curve given by Yoder and Eugster (1954) but the results of both...
Journal Article
Published: 01 April 1979
American Mineralogist (1979) 64 (3-4): 424-431.
... on tetrahedral rotation, because its site has a more favorable potential as the tetrahedral rotation decreases and the tetrahedra are elongated. It is suggested that the tetrahedral elongation is larger when the positive tetrahedral charge is lower. This is confirmed by phlogopite refinements. It is suggested...
Journal Article
Published: 01 July 1966
American Mineralogist (1966) 51 (7): 1107-1123.
... complete and seven partial analyses are given. The studied material represents a solid solution extending from slightly zincian and manganoan varieties of phlogopite up to material in which the octahedral positions are occupied by Zn 50 and Mn 40 in atomic per cent with the balance Mg, Fe 2+ and Fe 3+ . Ba...
Journal Article
Published: 01 November 2002
European Journal of Mineralogy (2002) 14 (6): 1075-1085.
...Francesca TOMBOLINI; Maria Franca BRIGATTI; Augusto MARCELLI; Giannantonio CIBIN; Annibale MOTTANA; Gabriele GIULI Abstract In Fe-bearing trioctahedral 1M micas Fe 2+ occurs essentially in the octahedral O sheet whereas Fe 3+ either coexists with Fe 2+ in the octahedral M sites or, more rarely...
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Journal Article
Published: 01 July 2005
European Journal of Mineralogy (2005) 17 (4): 611-621.
... refinement]. The chemical formulae were based on O 12-x-y-z , where × is the proportion of (OH)- groups per formula unit and y and z are F- and Clin apfu, respectively. Table 2. Averaged chemical composition and chemical formulae for ferroan phlogopite and magnesian annite crystals (1M and 2M 1...
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Journal Article
Published: 01 October 1964
American Mineralogist (1964) 49 (9-10): 1427-1434.
...Ichiro Sunagawa Abstract Five sided grow th spirals are observed on phlogopite crystals occurring in druses of trachybasalt lavas. From an analysis of the morphology of the growth spirals, it is concluded that the phlogopite belongs to the 1M polymorph. Polymorphs consisting of many layers...
Journal Article
Published: 01 December 1993
American Mineralogist (1993) 78 (11-12): 1290-1298.
.... The polytype is 1M with space group C 2/ m . The unit-cell parameters are a = 5.228(7), b = 9.049(10), c = 9.819(12) Å, β = 100.42(13)°. As expected as a consequence of the tschermakitic substitution [6] Mg + [4] Si ⇌ [6] Al + [4] Al, coupled with the K ⇌ Na substitution, the ditrigonal distortion...
Journal Article
Published: 01 August 1986
American Mineralogist (1986) 71 (7-8): 955-965.
...M. Darby Dyar; Roger G. Burns Abstract A Mössbauer spectral study is described of 15 potassic ferruginous 1M micas representing a wide range of chemical compositions and parageneses. Considerable precaution was taken to alleviate problems due to oxidation and preferred orientation of mica platelets...
Journal Article
Published: 01 August 1972
American Mineralogist (1972) 57 (7-8): 1272-1293.
...A. Baronnet Abstract Self-nucleated and hydrothermally grown minute phlogopite crystal populations have been studied by electron microscope. Growth by Frank’s spiral mechanism is observed after an initial growth by a layer mechanism. Different types of spirals and their interactions have been...
Journal Article
Published: 01 July 1966
American Mineralogist (1966) 51 (7): 1124-1143.
... molecules, which form hydration shells about the exchangeable cations, are distributed randomly over the three sets of anion positions in the interlayer octahedral sheet. Llano vermiculite has formed by surface weathering of a parent 1M phlogopite, for which the accepted space group of C2/m does not permit...
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Selected bond lengths (Å) from structure refinement for ferroan <b>phlogopite</b>...
Published: 01 July 2005
Table 4a. Selected bond lengths (Å) from structure refinement for ferroan phlogopite-1M crystals (Space group: C 2/m) from Colli Albani volcano.
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Averaged chemical composition and chemical formulae for ferroan <b>phlogopite</b> ...
Published: 01 July 2005
Table 2. Averaged chemical composition and chemical formulae for ferroan phlogopite and magnesian annite crystals (1M and 2M 1 polytype) from Colli Albani volcano.
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Details of the X-ray data collection, structure refinement, and unit cell p...
Published: 01 July 2005
Table 3. Details of the X-ray data collection, structure refinement, and unit cell parameters for ferroan phlogopite and magnesian annite crystals (1M and 2 M 1 polytype) from Colli Albani volcano.
Journal Article
Published: 01 September 2012
European Journal of Mineralogy (2012) 24 (5): 799-815.
... . For the 2M 1 -polytype, the data points scatter much more and no correlations have been observed ( Table 3 ). This can be explained by the lower amount of this polytype in the mixture compared to phlogopite- 1M ( Table 2 ) resulting in lower quality data. Scanning electron microscopy (SEM...
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