Barium - Environmental Health Criteria 107

dc.contributor.author	United Nations Environment Programme
dc.contributor.author	World Health Organization
dc.contributor.author	International Labour Organisation
dc.contributor.organization	Economy Division
dc.date.accessioned	2019-08-19T18:03:21Z
dc.date.available	2019-08-19T18:03:21Z
dc.date.issued	1990
dc.description	Barium is one of the alkaline earth metals, having a relative atomic mass of 137.34 and an atomic number of 56. It has seven naturally occurring stable isotopes, of which 138Ba is the most abundant. Barium is a yellowish-white soft metal that is strongly electropositive. It combines with ammonia, water, oxygen, hydrogen, halogens, and sulfur, energy being released by these reactions. It also reacts strongly with metals to form metal alloys. In nature barium occurs only in a combined state, the principal mineral forms being barite (barium sulfate) and witherite (barium carbonate). Barium is also present in small quantities in igneous rocks and in feldspar and micas. It may be found as a natural component of fossil fuel and is present in air, water, and soil.	en
dc.format	Text
dc.identifier.isbn	92 4 157107 1
dc.identifier.uri	https://wedocs.unep.org/handle/20.500.11822/29454
dc.language	English
dc.rights.accessLevel	Public
dc.subject	environmental health
dc.subject	chemical
dc.title	Barium - Environmental Health Criteria 107	en

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