The adsorption of a monolayer of gas atoms is either commensurate or incommensurate. Superstructures of this type are often incommensurate. There are two types of overlayers&colon; commensurate and incommensurate. In Kuhn's model, different paradigms represented entirely different and incommensurate assumptions about the universe. Two-dimensional alloys is single atomic layer of alloy that is incommensurate with underlying substrate. However, the synodic and draconic months are incommensurate&colon; their ratio is not an integer number. This kind of attractor is called an -torus if there are incommensurate frequencies. She has posited that all intercultural interaction is inherently incommensurate to some degree. Superlubricity may occur when two crystalline surfaces slide over each other in dry incommensurate contact. These phases can instead by described by "magnetic superspace groups", which describe "incommensurate" order. This is called an incommensurate structure. The exact incommensurate condition is an extreme case when formula 37. Bilbao Incommensurate Crystal Structures Database, a database for incommensurately modulated and composite structures.