Resumen: The crystal structure of the salt calcium (2R,3R)-tartrate tetrahydrate {systematic name: poly[[diaqua[μ4-(2R,3R)-2,3-dihydroxybutanedioato]calcium(II)] dihydrate]}, {[Ca(C4H8O8)(H2O)2]·2H2O}n, is reported. The absolute configuration of the crystal was established unambiguously using anomalous dispersion effects in the diffraction patterns. High-quality data also allowed the location and free refinement of all the H atoms, and therefore to a careful analysis of the hydrogen-bond interactions. Idioma: Inglés DOI: 10.1107/S2053229624008015 Año: 2024 Publicado en: Acta Crystallographica Section C-Structural Chemistry 80, 10 (2024), 681-684 ISSN: 2053-2296 Factor impacto JCR: 0.9 (2024) Categ. JCR: CRYSTALLOGRAPHY rank: 23 / 31 = 0.742 (2024) - Q3 - T3 Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 188 / 239 = 0.787 (2024) - Q4 - T3 Factor impacto SCIMAGO: 0.209 - Condensed Matter Physics (Q4) - Inorganic Chemistry (Q4) - Physical and Theoretical Chemistry (Q4) - Medicine (miscellaneous) (Q4) - Materials Chemistry (Q4)