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On the basis of a multipole refinement of single‐crystal X‐ray diffraction data collected using an Ag source at 90 K to a resolution of 1.63 Å−1, a quantitative experimental charge density distribution has been obtained for fluorite (CaF2). The atoms‐in‐molecules integrated experimental charges for Ca2+ and F− ions are +1.40 e and −0.70 e, respectively. The derived electron‐density distribution, maximum...
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