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Sodalite
Presented By: Raja Wajahat
Sodalite
• Sodalite means sodium stone and it was given this name by
Thomson in 1811.
• It has a cubic crystal structure w...
Sodalite
• This framework has the composition Na6Al6Si6O24, but
contains additional ions next to the cations in the enclos...
Sodalite
• Lasurit, also called lapis lazuli, is a close relative of sodalite
that was highly valued by the early civiliza...
Sodalite
5Presented by: Raja Wajahat
Sodalite
• Various reasons have been suggested for the origin of the color
of sodalite:
• suggestions include the formatio...
Sodalite
• Sodalite often occurs in igneous rocks with rather low
SiO2 content, but also in metasomatized calcareous rocks...
Sodalite
• Sodalite is used as a gemstone or for the manufacture of
ornamental objects.
• In places, such as in Bahia, Bra...
Thank you!
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Sodalite Mineral

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Sodalite Mineral

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Sodalite Mineral

  1. 1. Sodalite Presented By: Raja Wajahat
  2. 2. Sodalite • Sodalite means sodium stone and it was given this name by Thomson in 1811. • It has a cubic crystal structure with the space group P43n. • The structure (pictured below) is characterized by the combination of silicon and aluminum atoms connected by oxygen bridges in cage-like frameworks, which in turn are packed to give a cubic structure. 2Presented by: Raja Wajahat
  3. 3. Sodalite • This framework has the composition Na6Al6Si6O24, but contains additional ions next to the cations in the enclosed cavities. • Thus, the average stoichiometry of sodalite is increased by two moles of Na+ and Cl– to Na8Al6Si6O24Cl2. 3Presented by: Raja Wajahat
  4. 4. Sodalite • Lasurit, also called lapis lazuli, is a close relative of sodalite that was highly valued by the early civilizations of the Near East and in Egypt. • In its sodalite cage, it contains radical anions of sulfur, which are regarded as the cause of the intense blue color (ultramarine) of the mineral. 4Presented by: Raja Wajahat
  5. 5. Sodalite 5Presented by: Raja Wajahat
  6. 6. Sodalite • Various reasons have been suggested for the origin of the color of sodalite: • suggestions include the formation of colloidal sodium in the cages and the presence of radical anions such as SO3–, Cl2–, or O–. • That the color is due to a metastable state, seems obvious, as the color disappears on heating. 6Presented by: Raja Wajahat
  7. 7. Sodalite • Sodalite often occurs in igneous rocks with rather low SiO2 content, but also in metasomatized calcareous rocks, e.g., in marble. • Worldwide, more than three hundred natural sources of sodalite are known, it is usually found as granular to massive aggregates of more than one meter and rarely as well-formed crystals. 7Presented by: Raja Wajahat
  8. 8. Sodalite • Sodalite is used as a gemstone or for the manufacture of ornamental objects. • In places, such as in Bahia, Brazil, where sodalite is more abundant, tiles and claddings are also made from it. 8Presented by: Raja Wajahat
  9. 9. Thank you!

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