Final answer:
Brittle micas TOT+c different from the TOT+c true micas refers to the difference in structure and properties between two types of micas. True micas have a layered structure that is flexible, while brittle micas have layers that easily break apart. Examples of true micas include muscovite, while examples of brittle micas are biotite and phlogopite.
Step-by-step explanation:
In geology, micas are a group of minerals that belong to the phyllosilicates. There are two main types of micas: the true micas and the brittle micas. True micas have a layer structure made up of tetrahedral and octahedral sheets, with a class of TOT+c. They have a high degree of flexibility and can be easily bent or peeled into thin layers. On the other hand, brittle micas have a different structure, with layers that can easily break apart into thin pieces, hence their name.
An example of a true mica is muscovite, which forms thin and flexible sheets. Brittle micas include biotite and phlogopite. These micas are less flexible and more easily breakable compared to true micas. They have different physical properties and uses in various industries including construction, cosmetics, and electronics.