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Two compounds containing isolated uranyl chromate and polychromate units were synthesized through room‐temperature reactions of uranyl nitrate, chromium(VI) oxide, and 18‐crown‐6/15‐crown‐5 in aqueous solutions. Uranyl chromate with 18‐crown‐6 consists of neutral ∞0[(UO2)(CrO4)(H2O)3] units formed by the bidentate character of the edge sharing UrO5 bipyramid with only CrO4 and organic molecules and...
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