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Johannsenite |
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Freed R L, Peacor D R |
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American Mineralogist 52 (1967) 709-720 |
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Refinement of the crystal structure of johannsenite |
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_database_code_amcsd 0000156 |
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9.978 9.156 5.293 90 105.48 90 C2/c |
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atom x y z Biso |
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Ca 0 .6981 .75 .58 |
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Mn 0 .0947 .75 .48 |
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Si .2129 .4083 .7637 .26 |
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O1 .3797 .4070 .8459 .39 |
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O2 .1368 .2569 .6705 .47 |
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O3 .1518 .4794 .0043 .40 |
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Canaphite |
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Rouse R C, Peacor D R, Freed R L |
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American Mineralogist 73 (1988) 168-171 |
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Pyrophosphate groups in the structure of canaphite, CaNa2P2O7.4(H2O): The |
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first occurrence of a condensed phosphate as a mineral |
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_database_code_amcsd 0001137 |
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5.673 8.48 10.529 90 106.13 90 Pc |
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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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Ca 0 .0124 0 .0136 .0163 .0099 .0001 .0038 .0000 |
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Na1 .2252 .3982 .9621 .0250 .0231 .0273 -.0019 -.0032 -.0006 |
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Na2 .7417 .3669 .4665 .0259 .0227 .0257 .0005 .0062 .0081 |
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P1 .1791 .2411 .2924 .0156 .0098 .0107 .0012 .0037 .0012 |
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P2 .3891 .0739 .8096 .0131 .0081 .0101 -.0027 .0054 -.0012 |
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O1 .3308 .9027 .1626 .0193 .0163 .0150 -.0035 .0069 -.0039 |
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OH2 .7769 .8527 .1165 .0166 .0223 .0177 -.0027 .0049 -.0016 |
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O3 .0736 .2224 .1462 .0225 .0161 .0182 -.0024 .0048 -.0024 |
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OH4 .1501 .5852 .1156 .0204 .0226 .0244 .0041 .0004 .0040 |
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O5 .9956 .2055 .3688 .0172 .0132 .0224 .0021 .0082 .0006 |
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O6 .3209 .3900 .3306 .0172 .0108 .0174 -.0104 -.0058 -.0079 |
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OH7 .8044 .5858 .3460 .0232 .0179 .0298 -.0019 .0033 .0054 |
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OH8 .6257 .3879 .1130 .0195 .0409 .0350 .0009 .0000 -.0134 |
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O9 .6434 .8721 .3819 .0107 .0186 .0147 .0013 -.0032 -.0010 |
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O10 .1933 .8578 .3636 .0161 .0164 .0158 -.0045 .0097 -.0034 |
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O11 .3969 .1115 .3392 .0195 .0078 .0267 .0011 .0076 -.0010 |
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Ribbeite |
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Freed R L, Rouse R C, Peacor D R |
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American Mineralogist 78 (1993) 190-194 |
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Ribbeite, a second example of edge-sharing silicate tetrahedra in the |
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leucophoenicite group |
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_database_code_amcsd 0001545 |
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10.732 15.672 4.811 90 90 90 Pnma |
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atom x y z occ Biso |
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Mn1 .86850 .14501 .49334 1.11 |
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Mn2 .59124 .25 .51449 1.11 |
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Mn3 .64402 .06127 -.00408 1.24 |
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Si1 .7779 .25 .0712 0.55 |
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Si2 .4613 .0448 .5835 .5 0.65 |
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O1 .4616 .0432 .2672 1.22 |
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O2 .7778 .25 .7381 0.73 |
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O3 .9179 .25 .2125 0.78 |
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O4 .7101 .1681 .2123 0.75 |
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O5 .5286 .1373 .7311 1.58 |
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O6 .3109 .0439 .7344 1.37 |
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H1 .555 .126 .569 .5 1.7 |
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H2 .345 .034 .600 .5 2.0 |
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Margarosanite |
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Freed R L, Peacor D R |
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Zeitschrift fur Kristallographie 128 (1969) 213-228 |
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Determination and refinement of the crystal structure of margarosanite, |
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PbCa2Si3O9 |
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Locality: Parker Shaft, North Mine Hill, Franklin, New Jersey, USA |
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_database_code_amcsd 0010672 |
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6.768 9.575 6.718 110.36 102.98 83.02 P-1 |
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atom x y z Biso |
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Pb .0886 .1582 .2865 .57 |
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Ca1 .2700 .4951 .7629 .19 |
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Ca2 .4430 .1677 .9297 .43 |
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Si1 .0957 .7817 .1590 .28 |
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Si2 .2328 .5149 .2803 .38 |
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Si3 .4382 .7982 .5148 .3 |
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O1 .2274 .7469 .9779 .35 |
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O2 .1092 .1245 .9071 .24 |
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O3 .2299 .8790 .3955 1.15 |
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O4 .0469 .6266 .1967 .34 |
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O5 .3732 .4380 .1057 .49 |
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O6 .1238 .4072 .3561 .72 |
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O7 .3569 .6373 .5073 .37 |
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O8 .4795 .0977 .2392 .39 |
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O9 .3885 .2379 .6244 .35 |
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