The expression "material part of" is correct and usable in written English.
You can use it to talk about something that is important or relevant to a discussion, something that makes a significant contribution or is a key element. For example, "The material part of the story is that she had left her job and moved to a new city."
And that will certainly be a material part of the planet".
Extreme variance of opinion has long been a material part of the Maazel story.
"IPC will actually be a more material part of a new publishing business than it perhaps feels in the empire as a whole".
"The mantelpiece was a material part of the quaint character that had endeared my buyers to the property," Ms. Cohen said.
"This case cries out for the kind of civil penalty that will deprive this defendant of a material part of his fortune," he said.
Indeed, the lion's share of "Proust's Way" recycles them, with some reorganization and with some additional material, part of it published as articles in The New York Review of Books and elsewhere.
The material parts of a given system and their interrelationship were idealized for the purposes of analysis.
In Citi's case, these included "deficiencies" that had been identified previously, including insufficient ability to produce models on the impact on revenues and losses for "material parts of the firm's global operations".
Formal mereologies are difficult to apply to the material parts of biological mechanisms.
Among the material parts of an object are also its qualities (Beschaffenheiten) such as extension, weight, color, etc. (1894, §10, 58).
On the structural conception, chemical bonds are sub-molecular, material parts of molecules, which are localized between individual atomic centers and are responsible for holding the molecule together.
