STRONTIUM IN THE APATITE STRUCTURE: STRONTIAN FLUORAPATITE AND BELOVITE-(Ce)

Rakovan, John; Hughes, John M.

doi:10.2113/gscanmin.38.4.839

Cited by 93 publications

(62 citation statements)

References 23 publications

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“…Hydroxyapatite lattice parameters and the unit cell volume increase linearly with Sr 2+ addition, consistent with a larger ion entering the apatite lattice [7]. In nature, strontium is one of the most common substituents in mineral apatite [8]. Sr 2+ can also be incorporated in the apatite phase of animal and human bones [9].…”

Section: Introductionmentioning

confidence: 79%

Resource recovery of animal bones: Study on sorptive properties and mechanism for Sr2+ ions

Smičiklas

Dimović

Šljivić

et al. 2010

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 79%

Resource recovery of animal bones: Study on sorptive properties and mechanism for Sr2+ ions

Smičiklas

Dimović

Šljivić

et al. 2010

Journal of Nuclear Materials

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“…There are three pathways (3)(4)(5) that can occur in the a/ b plane, for which the lowest activation energy (pathway 4) is 1.7 eV. Therefore, considerable anisotropy in Ca 2?…”

Section: Resultsmentioning

confidence: 99%

“…The naturally occurring mineral apatite exhibits space group R6 3 /m [4] and its chemical formula is described as: A 10 (XO 4 ) 6 B 2 [5], where the most common anionic groups, B -, are: F, OH or Cl while A = Ca, Sr, Pb, Na, etc. and X = P, As, Si, V, etc.…”

Section: Introductionmentioning

confidence: 99%

Divalent cation diffusion in calcium fluorapatite

et al. 2011

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The mechanisms by which calcium ions are transported through the fluorapatite lattice are investigated using computer simulations. Cation vacancy assisted pathways are considered and migration energy barriers are calculated using a nudged elastic band transition state search. Migration activation energies for a range of divalent cations, in addition to calcium are compared. Generally there is very little change in activation energy as cation radius increases. Furthermore, in all cases the lowest energy migration pathways occur parallel to the c-axis either associated with the central anion channel via Ca(2) sites or away from the channel and via Ca(1) sites.

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“…All apatites follow a belovite substitution trend in the Ca-site expressed as 5Ca 2+ ⇋ 3Sr 2+ + Na + + REE 3+ (Nadezhina et al 1987, Rakovan andHughes 2000). Prevalence of sulfur over…”

Section: Accepted Manuscriptmentioning

confidence: 99%