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General Merrillite-(Y) Information ... Search for Merrillite-(Y) Images ... Physical Properties of Merrillite-(Y)
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General Merrillite Information ... Extraterrestrial bodies. The name merrillite was proposed in 1917. ... 08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m...
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Merrillite-(Y) mineral data, information about Merrillite-(Y), its properties and worldwide locations. ... This page provides mineralogical data about Merrillite-(Y).
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Whitlockite Group . Mg-dominant analogue of Ferromerrillite . Merrillite was revalidated as a valid species in 1976. All reported non-terrestrial 'whitlockites' are actually merrillite ... Classification of Merrillite...
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Note the relatively smooth patterns of the lunar merrillite and the close correspondence of chondrite-normalized Y to Ho and Er. Lunar examples from Jolliff ...
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TABLE 2. Atomic parameters for whitlockite and merrillite samples ... y, 0.14521(5), 0.14684(4), 0.14681(3), 0.14678(3), 0.14232(3) ...
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Lunar merrillite, ideally (Mg, Fe2+, Mn2+)2[Ca18-x (Y,REE)x](Na2-x)(P,Si)14O56, contains high concentrations of Y+REE, reaching just over 3 atoms per 56 O ...
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Lunar merrillite is devoid of hydrogen, and thus no disordered tetrahedral groups exist. Charge balance for substituents Y and REE (for Ca) is maintained by ...
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vacancies on this site provide a favorable charge-balance for Y+REE↔Ca substitution. Lunar merrillite, approximately (Mg,Fe2+,Mn2+)2[Ca18-x (Y,REE)x](Na2-x)(P,Si)14O56, contains high concentrations of Y+REE, reaching just over 2 atoms per 56 O, or up to ~14 wt.% as (Y,RE)2O3.
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Charge balance for substituent Y and REE (for Ca) and Si (for P) in merrillite is maintained by vacancies in a partially-occupied Na site, with charge balance yielding (Y,REE) + Na – Si = 2 in merrillite.
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