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Slawsonite |
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Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E |
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American Mineralogist 92 (2007) 1190-1199 |
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The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: |
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The I-1-I2/c and I2/c-P2_1/c phase transitions |
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Sample: P = 4.4 GPa |
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Locality: synthetic |
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_database_code_amcsd 0004409 |
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8.209 12.780 14.009 90 115.27 90 I2/c |
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atom x y z occ Uiso |
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Ca .2672 -.0005 .0671 .2 .029 |
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Sr .2672 -.0005 .0671 .8 .029 |
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Si10 .9993 .1743 .1071 .037 |
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Al1z .9964 .1785 .6169 .033 |
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Al20 .6870 .1198 .1703 .035 |
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Si2z .6794 .1125 .6721 .036 |
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OA1 .0019 .1267 .9978 .038 |
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OA2 .5857 .9950 .1473 .046 |
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OB0 .8185 .1205 .1025 .042 |
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OBz .7976 .1255 .6075 .044 |
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OC0 .0012 .3004 .1177 .047 |
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OCz .0051 .3135 .6311 .056 |
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OD0 .1864 .1248 .1975 .047 |
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ODz .1932 .1207 .7052 .048 |
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