Silica | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Silicon_dioxide


00:01:06 1 Structure
00:06:58 2 Natural occurrence
00:07:07 2.1 Geology
00:07:53 2.2 Biology
00:10:44 3 Uses
00:10:53 3.1 Structural use
00:11:35 3.2 Precursor to glass and silicon
00:12:35 3.3 Fumed silica
00:14:13 3.4 Food and pharmaceutical applications
00:14:59 3.5 Personal care
00:15:19 3.6 Other
00:16:06 4 Production
00:16:33 4.1 Silica fume
00:17:02 4.2 Precipitated silica
00:18:28 4.3 On microchips
00:20:04 4.4 Laboratory or special methods
00:20:13 4.4.1 From organosilicon compounds
00:22:57 4.4.2 Other methods
00:24:00 5 Chemical reactions
00:30:26 5.1 Water solubility
00:31:12 6 Health effects
00:32:15 6.1 Occupational hazard
00:33:07 6.2 Pathophysiology
00:33:37 6.3 Regulation
00:34:27 7 Crystalline forms
00:34:46 8 See also



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SUMMARY
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Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2, most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. Notable examples include fused quartz, fumed silica, silica gel, and aerogels. It is used in structural materials, microelectronics (as an electrical insulator), and as components in the food and pharmaceutical industries.
Inhaling finely divided crystalline silica is toxic  and can lead to severe inflammation of the lung tissue, silicosis, bronchitis, lung cancer, and systemic autoimmune diseases, such as lupus and rheumatoid arthritis.
Inhalation of amorphous silicon dioxide, in high doses, leads to non-permanent short-term inflammation, where all effects heal.