General IMA2008-024 Information Chemical Formula: |
(Ca,Na,REE,[ ])7(Nb,Ti)[Si2O7]2OF3 |
Composition: |
Molecular Weight = 841.27 gm |
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Sodium 5.47 % Na 7.37 % Na2O |
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Calcium 19.06 % Ca 26.66 % CaO |
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La,Ce,Pr,Nd,Sm, 17.12 % RE 19.97 % REE2O3 |
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Titanium 1.42 % Ti 2.37 % TiO2 |
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Niobium 8.28 % Nb 11.85 % Nb2O5 |
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Silicon 13.35 % Si 28.57 % SiO2 |
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Oxygen 28.53 % O |
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Fluorine 6.77 % F 6.77 % F |
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- %
F -2.85 % -O=F2 |
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100.00 % 100.71 % = TOTAL OXIDE |
Empirical Formula: |
Ca4Na2REENb0.75Ti0.25(Si2O7)2OF3 |
Environment: |
Rinkite group |
IMA Status: |
Proposed IMA 2008 (Dana # Added) |
Locality: |
Rouma Island, Los Archipelago, Guinea Link to MinDat.org Location Data. |
Name Origin: |
Commission on New Minerals, Nomenclature and Classification (CNMNC) |
| | Search for IMA2008-024 Images
Images:
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| | IMA2008-024 Crystallography Axial Ratios: |
a:b:c =0.6616:1:1.6626 |
Cell Dimensions: |
a = 7.473, b = 11.294, c = 18.778, Z = 4; beta = 101.6° V = 1,552.49 Den(Calc)= 3.60 |
Crystal System: |
Monoclinic - DomaticH-M Symbol (m) Space Group: Cc |
X Ray Diffraction: |
By Intensity(I/Io): 3.057(1), 2.021(0.68), 1.68(0.6),2.689(0.46), 2.567(0.44), 2.79(0.4), 1.813(0.33), 2.004(0.33), |
| Optical Properties of IMA2008-024 Optical Data: |
NCalc= 1.72 - from Gladstone-Dale relationship (KC = 0.1997) where Ncalc=Dcalc*KC+1 |
| Calculated Properties of IMA2008-024 Electron Density: |
Bulk Density (Electron Density)=3.44 gm/cc |
note: Specific Gravity of IMA2008-024 =3.60 gm/cc. Fermion Index: |
Fermion Index = 0.04 |
Boson Index = 0.96 Photoelectric: |
PEIMA2008-024 = 116.96 barns/electron |
U=PEIMA2008-024 x relectron= 402.66 barns/cc. Radioactivity: |
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GRapi = 17,522.79 (Gamma Ray American Petroleum Institute Units)
IMA2008-024 is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Weight of pure IMA2008-024 in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.60 gm/cc.* | IMA2008-024 Classification Dana Class: |
56.02.05.06 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O |
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(56.02)with cations in [4] and/or >[4] coordination |
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(56.02.05)Mosandrite and related species |
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Strunz Class: |
09.BE.20 09 - SILICATES (Germanates) |
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09.B - Sorosilicates |
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09.BE -Si2O7 groups with additional anions; |
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| Other IMA2008-024 Information See Also: |
Links to other databases for IMA2008-024 : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Google Images 4 - Google Scholar 5 - MinDAT 6 - Mineralienatlas (Deutsch) 7 - Online Mineral Museum 8 - Ruff.Info Search for IMA2008-024 using: Visit our Advertisers for IMA2008-024 : A Bijoux Google Search for IMA2008-024Adam's Minerals Google Search for IMA2008-024 Cape Minerals Google Search for IMA2008-024 Dakota Matrix Minerals Google Search for IMA2008-024 Excalibur Mineral Corp. Google Search for IMA2008-024 Exceptional Minerals Google Search for IMA2008-024 John Betts Fine Minerals Search for IMA2008-024 McDougall Minerals Google Search for IMA2008-024 Mineral News Website Link Rock and Mineral Shows Google Search for IMA2008-024 Weinrich Minerals, Inc. Google Search for IMA2008-024 Ask about IMA2008-024 here : Print or Cut-and-Paste your IMA2008-024 Specimen Label here :
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