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Merrillite-(Ca) Mineral Data |
General Merrillite-(Ca) Information |
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(Ca,[ ])19Mg2(PO4)14 | |
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Molecular Weight = 2,099.61 gm | |
Calcium 34.36 % Ca 48.08 % CaO | ||
Magnesium 2.32 % Mg 3.84 % MgO | ||
Phosphorus 20.65 % P 47.32 % P2O5 | ||
Oxygen 42.67 % O | ||
______ ______ | ||
100.00 % 99.24 % = TOTAL OXIDE | ||
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Ca18Mg2(PO4)14 | |
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Extraterrestrial bodies. | |
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Not Approved IMA 1977 | |
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Lunar rocks. Link to MinDat.org Location Data. | |
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Named after George Perkins Merrill (1854-1929), meteorite specialist at U. S. National Museum, Smithsonian Institution, Washington, D.C. USA. | |
Merrillite-(Ca) Crystallography |
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a:c = 1:3.58096 | |
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a = 10.362, c = 37.106, Z = 3; V = 3,450.34 Den(Calc)= 3.03 | |
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Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c | |
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By Intensity(I/Io): 2.85(1), 2.58(0.6), 3.19(0.6),3.43(0.6), 5.18(0.6), 1.71(0.5), 1.92(0.5), 1.54(0.4), | |
Physical Properties of Merrillite-(Ca) |
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Anhedral Grains - Granular minerals without the expression of crystal shapes | |
Optical Properties of Merrillite-(Ca) |
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CI calc= -0.051 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2051,KC= 0.1952 Ncalc = 1.59 |
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Uniaxial (-), e=1.62, w=1.623, bire=0.0030. | |
Calculated Properties of Merrillite-(Ca) |
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Bulk Density (Electron Density)=3.01 gm/cc note: Specific Gravity of Merrillite-(Ca) =3.03 gm/cc. |
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Fermion Index = 0.0029838637 Boson Index = 0.9970161363 |
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PEMerrillite-(Ca) = 5.27 barns/electron U=PEMerrillite-(Ca) x rElectron Density= 15.85 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Merrillite-(Ca) is Not Radioactive |
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Merrillite-(Ca) Classification |
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38.03.04.03 (38)Anhydrous Phosphates, etc | |
(38.03)(A+ B++)3 (XO4)2 | ||
(38.03.04)Whitlockite group | ||
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08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES | |
08.A - Phosphates, etc. without additional anions, without H2O | ||
08.AC -With medium-sized and large cations | ||
Other Merrillite-(Ca) Information |
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NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |
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Links to other databases for Merrillite-(Ca) : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Merrillite-(Ca) using: Visit our Advertisers for Merrillite-(Ca) : Ask about Merrillite-(Ca) here : Print or Cut-and-Paste your Merrillite-(Ca) Specimen Label here :
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