A crystalline form I of (R) -7-chloro-N- (quinuclidin-3-yl) benzo [b] thiophene-2-carboxamide monohydrate hydrochloride, characterized by a powder X-ray diffractogram having peaks expressed as 2θ at one or both of 17.48 and 20.58 ± 0.20 degrees when measured against an internal silicon pattern, and characterized by an X-ray powder diffractogram that also has at least four peaks, six peaks, eight peaks or all peaks expressed as 2θ to 4.50, 9.04, 14.60, 15.14, 15.80, 16.60, 18.16, 18.44, 19.48, 21.74, and 25.46 ± 0.20 degrees when measured against an internal silicon pattern.Una forma cristalina I de hidrocloruro de (R)-7-cloro-N-(quinuclidin-3-il)benzo[b]tiofeno-2-carboxamida monohidrato, caracterizada por un difractograma de rayos X de polvo que tiene picos expresados como 2θ en uno o ambos de 17,48 y 20,58 ± 0,20 grados cuando se mide frente a un patrón interno de silicio, y caracterizada por un difractograma de rayos X de polvo que tiene además al menos cuatro picos, seis picos, ocho picos o todos los picos expresados como 2θ a 4,50, 9,04, 14,60, 15,14, 15,80, 16,60, 18,16, 18,44, 19,48, 21,74, y 25,46 ± 0,20 grados cuando se mide frente a un patrón interno de silicio.
