The current JCPDS powder pattern for the racemic compound fenoprofen calcium dihydrate (card No. 44-1790) is unindexed. Previously we reported the single crystal data, determined at −100 °C, for this material (Zhu et al., 2001). Using 2θ values obtained from a powder pattern spiked with internal standards, we indexed the room temperature powder pattern. The resulting unit cell values for the monoclinic P21/n cell are a=19.018 Å, b=7.738 Å, c=19.472 Å, β=91.66°.

A poster session was held during the Annual Spring Meeting of the International Centre for Diffraction Data on 20 March 2002. Abstracts of the posters are reproduced in the following. The underlined authors can be contacted for more information.

X-ray powder data originally published for the zeolite mineral goosecreekite are of poor quality. The new data reported here for material from Norway are compared with powder data calculated from the published structure. The cell is monoclinic (space group P21, Z=2), a=7.422(2) Å, b=17.414(4) Å, c=7.288(2) Å, β=105.43(3)°, V=907.9(3) Å3. F30=32.75(0.023,40).