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  • Arsenic
  • The Food and Drug Administration (FDA) is re-issuing its warning to consumers not to drink Jermuk brand mineral water due to the risk of exposure to arsenic, a toxic substance and a known cause of cancer in humans. (webwire.com)
  • deposits
  • The mineral is easily weathered to secondary lead minerals, the upper part of galena deposits often containing cerussite , anglesite , and pyromorphite . (britannica.com)
  • Some mineral deposits are formed, improved, or preserved by geologic processes that occur in arid lands as a consequence of climate. (usgs.gov)
  • Of the 15 major types of mineral deposits in the Western Hemisphere formed by action of ground water, 13 occur in deserts. (usgs.gov)
  • Playas may be sources of mineral deposits formed by evaporation. (usgs.gov)
  • The minerals formed in these evaporite deposits depend on the composition and temperature of the saline waters at the time of deposition. (usgs.gov)
  • Significant evaporite resources occur in the Great Basin Desert of the United States, mineral deposits made forever famous by the "20-mule teams" that once hauled borax-laden wagons from Death Valley to the railroad. (usgs.gov)
  • liquid mercury , though sometimes found in mercury ore deposits, is not classified as a mineral either. (britannica.com)
  • composition
  • Vermiculite , clay mineral similar to montmorillonite in structure and, in some cases, composition . (britannica.com)
  • By its definition as a homogeneous solid, a mineral is composed of a single solid substance of uniform composition that cannot be physically separated into simpler compounds . (britannica.com)
  • Since a mineral has a definite composition, it can be expressed by a specific chemical formula . (britannica.com)
  • colour
  • Chrysotile fibre usually has a whitish colour, but fibres of the amphibole minerals may be pale green, yellow, or blue. (britannica.com)
  • group
  • In lubricating oils, mineral oil is termed from groups 1 to 2 worldwide and group 3 in certain regions. (wikipedia.org)
  • This is because the high end of group 3 mineral lubricating oils are so pure that they exhibit properties similar to polyalphaolefin - PAO oils (group 4 synthetics). (wikipedia.org)
  • The other types all belong to the amphibole group of minerals and include the fibrous forms of anthophyllite , amosite (grunerite), crocidolite (riebeckite), tremolite, and actinolite . (britannica.com)
  • Olivines are an important rock-forming mineral group. (britannica.com)
  • Clay mineral , any of a group of important hydrous aluminum silicates with a layer (sheetlike) structure and very small particle size. (britannica.com)
  • Garnet , any member of a group of common silicate minerals that have similar crystal structures and chemical compositions . (britannica.com)
  • gemstones
  • Man-made versions of minerals, including emeralds, sapphires, diamonds, and other valuable gemstones, are regularly produced in industrial and research facilities and are often nearly identical to their natural counterparts. (britannica.com)
  • bones
  • Minerals are used by animals and microorganisms for the process of mineralizing structures, called " biomineralization ", used to construct bones, seashells , eggshells , exoskeletons and mollusc shells . (wikipedia.org)
  • The body uses minerals to perform many different functions - from building strong bones to transmitting nerve impulses. (kidshealth.org)
  • This mineral helps build strong bones, so you can do everything from standing up straight to scoring that winning goal. (kidshealth.org)
  • hydroxylapatite [Ca 5 (PO 4 ) 3 (OH)] is the chief component of bones and teeth, and calculi are concretions of mineral substances found in the urinary system. (britannica.com)
  • species
  • More than 200 species of phosphate minerals are recognized, and structurally they all have isolated (PO 4 ) tetrahedral units. (britannica.com)
  • major
  • Ames BN, Wakimoto P (2002) Are vitamin and mineral deficiencies a major cancer risk? (springer.com)
  • While minerals are classified in a logical manner according to their major anionic (negatively charged) chemical constituents into groups such as oxides, silicates, and nitrates, they are named in a far less scientific or consistent way. (britannica.com)
  • nutrition
  • Mineral nutrients are sometimes categorized according to the amount required in the human diet to maintain good nutrition. (springer.com)
  • exports
  • Backlash over China curb on metal exports China's draconian export curbs on rare earth minerals needed by the rest of the world for frontier technologies is escalating into a serious diplomatic and trade clash with the United States and other leading powers. (freerepublic.com)
  • amounts
  • Well, yes, but small amounts of some minerals are also in foods - for instance, red meat, such as beef, is a good source of iron. (kidshealth.org)
  • Because it is one of the few minerals containing appreciable amounts of rubidium , it is useful in determining geological age according to strontium-rubidium ratios. (britannica.com)
  • In most rocks, however, garnets occur in only minor amounts-i.e., they are accessory minerals. (britannica.com)
  • resources
  • Larger organisms may also consume soil ( geophagia ) or use mineral resources, such as salt licks , to obtain limited minerals unavailable through other dietary sources. (wikipedia.org)
  • focuses
  • This inquiry focuses on the competitive conditions on the production and wholesale levels of the mineral oil sector upstream of the petrol station markets. (bundeskartellamt.de)
  • general
  • Colorado Attorney General John Suthers and representatives from nine other states have signed a letter to the Obama Administration demanding the administration pay up on mineral lease revenues owed to the states under the 1920 Mineral Leasing Act. (freerepublic.com)
  • This is the category of minerals in general. (wikipedia.org)
  • particularly
  • Mineral oil is any of various colorless, odorless, light mixtures of higher alkanes from a mineral source, particularly a distillate of petroleum . (wikipedia.org)
  • Mineral physics is the science of materials that compose the interior of planets, particularly the Earth. (wikipedia.org)