Magnesium carbonate (MgCO₃) differs primarily in its production process

Magnesium carbonate (MgCO₃) differs primarily in its production process, leading to variations in physical properties and applications. This can be summarized as "light and loose, heavy and dense."

1. Production Process:

- Light magnesium carbonate: Chemically synthesized (e.g., by reacting magnesium sulfate with sodium carbonate), then precipitated, filtered, and calcined; classified as "synthetic magnesium."

- Heavy magnesium carbonate: Obtained by directly crushing and purifying natural magnesite; classified as "natural magnesium."

2. Physical Properties:

- Light magnesium carbonate: Low bulk density (0.1-0.3 g/cm³), fine particles (several micrometers in diameter), large specific surface area, and a fluffy feel.

- Heavy magnesium carbonate: High bulk density (0.8-1.2 g/cm³), coarse particles (tens of micrometers in diameter), small specific surface area, and a heavy feel.

3. Core Applications:

- Lightweight: Focuses on "functionality," such as rubber/plastic fillers (enhancing flexibility), food anti-caking agents (keeping powder loose), pharmaceutical antacids (quickly neutralizing stomach acid), and cosmetic oil absorbents.

- Heavyweight: Focuses on "filling/increasing volume," such as extender pigments in paints and inks (improving hiding power), building material fillers (reducing costs), and feed additives (supplementing magnesium).