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Kalsilite |
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Cellai D, Bonazzi P, Carpenter M A |
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American Mineralogist 82 (1997) 276-279 |
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Natural kalsilite, KAlSiO4, with P31c symmetry: Crystal structure and twinning |
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5.157 5.157 8.706 90 90 120 P31c |
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atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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K 0 0 .25 .0154 .0154 .0187 .0077 0 0 |
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Al1 1/3 2/3 .0594 .0013 .0013 .0112 .00065 0 0 |
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Si2 1/3 2/3 .4416 .0104 .0104 .0058 .0052 0 0 |
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O1 .616 .011 .000 .009 .009 .031 .003 .006 .004 |
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O2 1/3 2/3 .260 .036 .036 .004 .018 0 0 |
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Kalsilite |
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Cellai D, Gesing T M, Wruck B, Carpenter M A |
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American Mineralogist 84 (1999) 1950-1955 |
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X-ray study of the trigonal-hexagonal phase transition in metamorphic kalsilite |
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5.1627 5.1627 8.706 90 90 120 P6_3 |
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atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) |
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K 0 0 .25 .0174 .0174 .0194 .0087 0 0 |
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Al 1/3 2/3 .061 .0086 .0086 .011 .0043 0 0 |
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Si 1/3 2/3 .443 .0081 .0081 .007 .00405 0 0 |
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O1 1/3 2/3 .241 .052 .052 .005 .026 0 0 |
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O2 .6027 .0119 .997 .011 .012 .036 .006 .003 .002 |
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Kalsilite |
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Perrotta A J, Smith J V |
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Mineralogical Magazine 35 (1965) 588-595 |
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The crystal structure of kalsilite, KAlSiO4 |
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Sample: Refinement with O2 on triad axis |
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Locality: Mt. Nyiragongo, Congo |
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5.161 5.161 8.693 90 90 120 P6_3 |
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atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) |
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K 0 0 .2435 1.18 .0148 .0148 .0034 .0074 0 0 |
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Al 1/3 2/3 .0486 .52 .0063 .0063 -.0005 .0032 0 0 |
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Si 1/3 2/3 .4300 .37 .0044 .0044 .0018 .0022 0 0 |
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O1 .3831 .9864 .4895 .97 .0074 .0084 .0095 .0039 -.0020 -.0016 |
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O2 1/3 2/3 .25 3.58 .0572 .0572 -.0005 .0286 0 0 |
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Kalsilite |
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Perrotta A J, Smith J V |
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Mineralogical Magazine 35 (1965) 588-595 |
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The crystal structure of kalsilite, KAlSiO4 |
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Sample: Refinement with O2 off triad axis |
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Locality: Mt. Nyiragongo, Congo |
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5.161 5.161 8.693 90 90 120 P6_3 |
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atom x y z occ Biso |
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K 0 0 .2411 1.18 |
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Al 1/3 2/3 .0461 .51 |
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Si 1/3 2/3 .4281 .35 |
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O1 .3831 .9875 .4858 1.01 |
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O2 .3339 .7155 .25 1/3 .94 |
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Kalsilite |
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Andou Y, Kawahara A |
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Mineralogical Journal 12 (1984) 153-161 |
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The refinement of the structure of synthetic kalsilite |
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Locality: synthetic |
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5.151 5.151 8.690 90 90 120 P6_3 |
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atom x y z Biso |
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K 0 0 .25 1.25 |
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Al 1/3 2/3 .054 .74 |
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Si 1/3 2/3 .436 .45 |
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O1 .610 .005 .993 1.4 |
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O2 .350 .713 .252 1.0 |
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Kalsilite |
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Kawahara A, Andou Y, Marumo F, Okuno M |
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Mineralogical Journal 13 (1987) 260-270 |
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The crystal structure of high temperature form of kalsilite (KAlSiO4) at 950 C |
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Note: B(1,2)'s corrected to obey symmetry restrictions |
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Note: Synthetic sample |
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Note: x(O1) adjusted to match reported bond lengths |
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5.30 5.30 8.65 90 90 120 P6_3mc |
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atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) |
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K 0 0 .25 9.3 .103 .103 .032 .0515 0 0 |
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Al 1/3 2/3 .058 2.5 .033 .033 .007 .0165 0 0 |
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Si 1/3 2/3 .439 5.6 .065 .065 .020 .0325 0 0 |
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O1 .506 .012 .984 6.7 .074 .062 .029 .043 -.007 .002 |
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O2 .407 .741 .250 1/6 3.4 |
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