Miller indices describe the structure of the unit cells of these objects, which may have orthorhombic and cubic lattices.
These objects may be described by terms like "stellate" and "enantiomorphic", which describe their habits. Pure ones may be produced by dissolving the products of a reaction in a minimal amount of solvent, heating, and slowly cooling, often using glass particles as seeds. This form of tartaric acid was used by Pasteur when he performed the first chiral resolution. Miller indices describe the structure of the unit cells of these objects, which may have orthorhombic and cubic lattices. Franklin's use of X-ray diffraction to study DNA required it to be in this form. For 10 points, name these solids such as quartz which have a definite, repeating arrangement of atoms.
These objects may be described by terms like "stellate" and "enantiomorphic", which describe their habits.
crystals [accept word forms like crystalline; prompt on “minerals”; do not accept “rocks”]