我悲伤
发表于 2025-3-25 06:53:56
http://reply.papertrans.cn/89/8802/880112/880112_21.png
机构
发表于 2025-3-25 11:09:03
http://reply.papertrans.cn/89/8802/880112/880112_22.png
GRIN
发表于 2025-3-25 13:34:08
Crystal Geometry. I, species. X-ray crystallography is a relatively new discipline, dating from the discovery in 1912 of the diffraction of X-rays by crystals. This year marked the beginning of the experimental determination of crystal structures. Figure 1.1 illustrates the structure of sodium chloride, which was among
Exuberance
发表于 2025-3-25 17:11:28
Crystal Geometry. II,ized by periodicities in three dimensions. An atomic grouping is repeated over and over again by a certain symmetry mechanism so as to build up a crystal, and thus we are led to a consideration of space-group symmetry. A space- group pattern in its simplest form may be considered to be derived by re
自爱
发表于 2025-3-25 22:59:34
http://reply.papertrans.cn/89/8802/880112/880112_25.png
亲密
发表于 2025-3-26 00:42:52
http://reply.papertrans.cn/89/8802/880112/880112_26.png
节约
发表于 2025-3-26 05:03:22
rd bedrock of structural results in chemistry and in mineralogy. In biology, where the structures are not fuIly crystaIline, it can still provide valuable results and, indeed, the impact here has been revolutionary. It is still an immense field for young workers, and no doubt will provide yet more s
Ebct207
发表于 2025-3-26 10:34:22
Crystal Geometry. I,marked the beginning of the experimental determination of crystal structures. Figure 1.1 illustrates the structure of sodium chloride, which was among the first crystals to be studied by the new X-ray techniques.
evanescent
发表于 2025-3-26 15:46:30
http://reply.papertrans.cn/89/8802/880112/880112_29.png
CORD
发表于 2025-3-26 18:00:13
Preliminary Examination of Crystals by Optical and X-Ray Methods,ll dimensions, and may be carried out by a combination of optical and X-ray techniques. The optical methods described here are simple, but, nevertheless, often very effective; they should be regarded as a desirable prerequisite to an X-ray structure determination.