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1980 (1)
1Author    F.C M DriessensRequires cookie*
 Title    Probable Phase Composition of the Mineral in Bone  
 Abstract    Formulas proposed for the mineral of bone were reviewed. Literature data were collected where Ca, P, Na, Mg and C 0 3 are determined in the same samples. These data were analyzed for their conformity to the above mentioned formulas. According to this analysis Mg is contained in a phase having the Ca/P of magnesium whitlockite within the limits o f error. Na is contained in a carbonated calcium phosphate phase which in analogy with synthetic systems must have the apatite structure. The Ca/P ratio o f the remaining "rest phase" is 2. This is based on the composi­ tion of 101 bone mineral samples taken from fishes, reptiles, amphibians, birds and mammals. The C 0 3 content of the bone samples agrees with the formula Ca8 (P 0 4)4 (C 0 3) (OH)2 • x H20 for the "rest phase" within the limits of experimental error. Such a compound has, however, not been found in synthetic systems. Human bone contains about 15% magnesium whitlockite, 25% of the Na and C 0 3 containing apatite and the rest is the carbonated calcium phosphate with Ca/P = 2. It is presumed that this compound has a structure similar to that o f octo calcium phosphate and that most o f the citrate ions which always occur in bone mineral samples are in­ corporated in that phase. 
  Reference    Z. Naturforsch. 35c, 357—362 (1980); received January 15 1980 
  Published    1980 
  Keywords    Bone, Mineral, Phase Composition, Citrate 
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 TEI-XML for    default:Reihe_C/35/ZNC-1980-35c-0357.pdf 
 Identifier    ZNC-1980-35c-0357 
 Volume    35