General Ruifrancoite Information![]() Ca2([ ],Mn)2(Fe+++,Mn,Mg)4Be4(PO4)6(OH)4•6H2O |
![]() Molecular Weight = 1,075.85 gm |
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Calcium 7.04 % Ca 9.85 % CaO |
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Magnesium 1.94 % Mg 3.22 % MgO |
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Manganese 6.28 % Mn 8.11 % MnO |
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Beryllium 3.35 % Be 9.30 % BeO |
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Aluminum 0.45 % Al 0.85 % Al2O3 |
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Iron 11.84 % Fe 3.94 % FeO / 12.54 % Fe2O3 |
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Phosphorus 17.27 % P 39.58 % P2O5 |
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Hydrogen 1.41 % H 12.60 % H2O |
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Oxygen 50.41 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() Ca1.89Mn2+0.55Fe3+1.69Mg0.86Mn2+0.68Fe2+0.59Al0.18Be4(PO4)6(OH)4.75(H2O)1.25·3.9(H2O)
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![]() Occurs as a late vug-filling product in a zoned, LCT-type granitic pegmatite. Roscherite group. |
![]() Approved IMA 2005 (Dana # Added) |
![]() Sapucaia mine, Minas Gerais, Brazil. Link to MinDat.org Location Data. |
![]() Named for Rui Ribeiro Franco (b. 1916), in recognition of his outstanding contributions to Brazilian mineralogy and geology. |
![]() IMA2005-061a |
| | Ruifrancoite Image
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Ruifrancoite Crystallography![]() a:b:c =1.3366:1:0.5549 |
![]() a = 15.92, b = 11.91, c = 6.61, Z = 2; beta = 96.4° V = 1,245.49 Den(Calc)= 2.87 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c |
![]() By Intensity(I/Io): 5.943(1), 4.816(0.65), 3.169(0.44),9.485(0.44), 2.643(0.42), 2.777(0.41), 3.117(0.25), 3.065(0.22), |
| Physical Properties of Ruifrancoite![]() {100} Perfect, {010} Good |
![]() Reddish brown. |
![]() 2.88 |
![]() Transparent |
![]() Brittle - Generally displayed by glasses and most non-metallic minerals. |
![]() Acicular - Occurs as needle-like crystals. |
![]() Botryoidal - "Grape-like" rounded forms (e.g.. malachite). |
![]() Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape. |
![]() 4.5 - Between Fluorite and Apatite |
![]() orange brown |
| Optical Properties of Ruifrancoite![]() CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2337,KPDmeas= 0.2329,KC= 0.2294 Ncalc = 1.66 ![]() Biaxial (+), a=1.665, b=1.665, g=1.682, bire=0.0170, 2V(Calc)=0, 2V(Meas)=0-10. Dispersion r > v very strong. |
| Calculated Properties of Ruifrancoite![]() Bulk Density (Electron Density)=2.85 gm/cc |
note: Specific Gravity of Ruifrancoite =2.88 gm/cc. ![]() Fermion Index = 0.03 |
Boson Index = 0.97 ![]() PERuifrancoite = 6.87 barns/electron |
U=PERuifrancoite x rElectron Density= 19.58 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Ruifrancoite is Not Radioactive | Ruifrancoite Classification![]() 42.07.07.08 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen |
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(42.07)where (AB)5 (XO4)3 Zq · x(H2O) |
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(42.07.07)Roscherite group |
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![]() 08.DA.10 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.D - Phosphates, etc |
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08.DA -With small (and occasionally larger) cations |
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| Other Ruifrancoite Information![]() NAME( CanMin, v45:1263) PHYS. PROP.(CanMin, v45:1263) OPTIC PROP.(CanMin, v45:1263) |
![]() Links to other databases for Ruifrancoite : |
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 Ruifrancoite using: Visit our Advertisers for Ruifrancoite : A Bijoux Google Search for RuifrancoiteAdam's Minerals Google Search for Ruifrancoite Cape Minerals Google Search for Ruifrancoite Dakota Matrix Minerals Google Search for Ruifrancoite Excalibur Mineral Corp. Google Search for Ruifrancoite Exceptional Minerals Google Search for Ruifrancoite John Betts Fine Minerals Search for Ruifrancoite McDougall Minerals Google Search for Ruifrancoite Mineral News Website Link Rock and Mineral Shows Google Search for Ruifrancoite Weinrich Minerals, Inc. Google Search for Ruifrancoite Ask about Ruifrancoite here : Print or Cut-and-Paste your Ruifrancoite Specimen Label here :
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