SciFinder is not an optimal source to find crystal structure information for inorganic crystals; nevertheless, it can provide some good information, particularly if the substance for which you are searching does not appear in Reaxys or ICSD.
Using the Experimental Properties Information in the Substance Record
Search for the substance by name or formula in the Explore Substances context. From the brief substance record, you can click a link to zoom you directly to experimental properties of that substance. Some substances will have a section entitled Structure-related Properties, which may direct you to references that include the crystal's bond length and angle, crystal structure, or crystal lattice parameters.
Getting References Related to the Crystal Structure of a Substance
Chemical Abstracts article records are indexed with the Registry Numbers of all important substances in the article, as well as the role that each substance plays. If the substance you want does not have the correct experimental properties in its record, you can try to link from the substance record to articles that deal with the crystal structure.
The resulting references will all at least mention the crystal structure of the substance you wanted.