Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

Which minerals and natural materials contain sodium compounds?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram shows the periodic table entry for sodium, highlighting its symbol Na, atomic number 11, atomic weight, electron configuration, physical state as a solid, body-centered cubic crystal structure, and strongly basic oxide properties.
sodium

Because sodium is extremely reactive, it does not occur in its free elemental form in the Earth's crust. Instead, it is found in a variety of minerals and natural materials:1

  • Halite (Rock Salt): The most common source of sodium is halite, which is naturally occurring sodium chloride (NaCl). It is found in vast underground beds and salt domes formed by the evaporation of ancient seawater.23
  • Silicate Minerals: Sodium is a significant constituent of various silicate materials, including feldspars and micas.1
  • Carbonate Minerals: Sodium carbonate occurs in nature as the minerals natron, trona, and thermonatrite.4
  • Sulfate Minerals: Sodium sulfate is found in deposits of mirabilite and thenardite.4
  • Nitrate Deposits: Sodium nitrate, also known as Chile saltpetre, is found in significant deposits in regions such as Chile and Peru.14
  • Aqueous Sources: Sodium is abundant in seawater and natural brines, which serve as major sources for industrial extraction.145