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首页> 外文期刊>Contributions to Mineralogy and Petrology >Thermal expansion of plagioclase feldspars
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Thermal expansion of plagioclase feldspars

机译:斜长石长石的热膨胀

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The volume thermal expansion coefficient and the anisotropy of thermal expansion were determined for nine natural feldspars with compositions, in terms of albite (NaAlSi3O8, Ab) and anorthite (CaAl2Si2O8, An), of Ab100, An27Ab73, An35Ab65, An46Ab54, An60Ab40, An78Ab22, An89Ab11, An96Ab4 and An100 by high resolution powder diffraction with a synchrotron radiation source. Unit-cell parameters were determined from 124 powder patterns of each sample, collected over the temperature range 298–935 K. The volume thermal expansion coefficient of the samples determined by a linear fit of V/V 0 = α(T − T 0) varies with composition (X An in mol %) as: aV = 2.90( 4 ) ×10 - 5 - 3.0( 2 ) ×10 - 7 *XtextAn + 1.8( 2 ) ×10 - 9 *XtextAn2 alpha_{V} = 2.90left( 4 right) times 10^{ - 5} - 3.0left( 2 right) times 10^{ - 7} *X_{text{An}} + 1.8left( 2 right) times 10^{ - 9} *X_{text{An}}^{2}
机译:确定了九种具有组成的天然长石的体积热膨胀系数和热膨胀各向异性,分别是钠长石(NaAlSi 3 O 8 ,Ab)和钙长石(CaAl) Ab 100 ,An 27 2 Si 2 O 8 ,An) Ab 73 ,An 35 Ab 65 ,An 46 Ab 54 ,An < sub> 60 Ab 40 ,An 78 Ab 22 ,An 89 Ab 11 ,An 96 Ab 4 和An 100 以及同步辐射源进行高分辨率粉末衍射。在298–935 K的温度范围内,从每个样品的124种粉末模式中确定了晶胞参数。样品的体积热膨胀系数由V / V 0 的线性拟合确定。 α(T-T 0 )随组成(X An 摩尔%)的不同而变化:a V = 2.90(4)×10 < sup>-5 -3.0(2)×10 -7 * X textAn + 1.8(2)×10 -9 * X textAn 2 alpha_ {V} = 2.90left(4 right)乘以10 ^ {-5}-3.0left(2 right)乘以10 ^ {-7} * X_ {text {An}} + 1.8left(2 right)乘以10 ^ {-9} * X_ {text {An}} ^ {2}

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