'double structure' is a correct and usable term in written English.
It refers to two phrases joined together by a conjunctive phrase, often to put more emphasis on a particular idea. For example: "I wanted to go to the beach, but the weather was too bad--a double structure of conflicting desires."
Kehlmann also leaves out another of Humboldt's companions, Carlos Montúfar, perhaps for the double structure of scientist and follower.
The chromosomes, each of which is a double structure consisting of duplicate chromatids, line up along the midline of the cell at metaphase.
These two narrative strains, one objectively scientific, one deeply personal, intertwine to create his story's double structure, which in a sense reflects the dual nature of the disease itself.
Both field test and laboratory tests are successfully modelled by a coupled hydro-mechanical (HM) analysis using a double structure constitutive law.
We are using the VSOP spacecraft, HALCA, together with ground-based telescopes, to image six strong GPS sources with compact double structure.
An extreme example of adaptation to life near the air water interface, the habitat of most atheriniforms, is the eye of Anableps, the four-eyed fish, so named because each eye is a double structure.
Both the House and Senate have passed bills to increase the requirements for double structures on tankers.
Lobsters have been known to regenerate double structures, in which case the new parts are mirror images of each other.
In order to achieve high coupling efficiency and equal power separation, the grating depth, period and wavelength are optimized, and the double-structure design which consists of symmetrical subwavelength gratings is adopted.
The contemporary philosopher of social science, Rom Harre follows the theoretical sociologists in offering this kind of definition (Harre 1979: 98): "An institution was defined as an interlocking double-structure of persons-as-role-holders or office-bearers and the like, and of social practices involving both expressive and practical aims and outcomes".
Its double helix structure is an icon of our times.
