Question

Is MgCO3 crystalline?

Answer 1

Magnesium carbonate, also known as magnesite, is a common over the counter remedy for heartburn and upset stomach caused by overproduction of acid in the stomach [FDA Label]. MAGNESITE is a white, yellowish, grayish-white or brown crystalline solid or crystalline powder.
So your answer is: Yes, MgCO3 is crystalline :-)

Answer 2

yes magnesium carbonate is a crystalline powder greyish and yellowish in colour..