Titanium dioxide. a compound with three distinct crystal forms found in nature. includes rutile. anatase. and plagioclase. Rutile is the most prevalent and stable form with a square crystal structure featuring titanium atoms at the corners. Its widespread use can be attributed to its high refractive index. hardness. and brightness. Meanwhile. anatase shares a square crystal system with rutile but has less compactly arranged titanium atoms. Its white color and optical properties make it ideal for applications in photocatalysis and as a pigment in paints. The least common and least stable form of titanium dioxide is plate titanite. Its rhombohedral crystal structure has titanium atoms situated in irregular positions. The difficulty of synthesizing and converting it to other phases at high temperatures limits its industrial usage.

Yes, popcorn is indeed considered a good source of dietary fiber. It originates from whole grains, which are known to be rich in fibers. The fiber found in popcorn is predominantly insoluble, which aids digestion and can contribute to bowel health. When air-popped without adding excessive butter or salt, popcorn can be a healthful snack. A serving of popcorn (about 3 cups popped) provides roughly 3.5 to 4 grams of fiber, which contributes to the daily dietary fiber recommendation of 25 grams for women and 38 grams for men, as advised by the USDA. However, it's important to consume it in moderation as part of a balanced diet to manage caloric intake.