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Imandrite Mineral Data + |
General Imandrite Information |
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| Na12Ca3Fe+++2Si12O36 | |||
| Molecular Weight = 1,420.81 gm | |||
| Sodium 19.42 % Na 26.17 % Na2O | |||
| Calcium 8.46 % Ca 11.84 % CaO | |||
| Iron 7.86 % Fe 11.24 % Fe2O3 | |||
| Silicon 23.72 % Si 50.75 % SiO2 | |||
| Oxygen 40.54 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Na12Ca3Fe3+2Si12O36 | |||
| Found in eudialyte in an alkalic pegmatite. | |||
| Approved IMA 1979 | |||
| Khibiny massif, near Lake Imandra, Kola Peninsula, Russia. Link to MinDat.org Location Data. | |||
| Named for the locality. | |||
| ICSD 200805 | |||
| PDF 39-403 | |||
Search for Imandrite Images | |||
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Imandrite Crystallography |
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| a:b:c =0.7041:1:0.9796 | |||
| a = 7.426, b = 10.546, c = 10.331, Z = 1; V = 809.07 Den(Calc)= 2.92 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm | |||
| By Intensity(I/Io): 2.63(1), 1.853(0.7), 3.33(0.6), | |||
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Physical Properties of Imandrite |
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| Honey yellow. | |||
| 2.93 | |||
| Transparent | |||
| Anhedral Grains - Granular minerals without the expression of crystal shapes | |||
| 5-5.5 - Apatite-Knife Blade | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Imandrite |
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| CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2083,KPDmeas= 0.2076,KC= 0.2156 |
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| Biaxial (+), a=1.605, b=1.608, g=1.612, bire=0.0070, 2V(Calc)=82, 2V(Meas)=75. | |||
Calculated Properties of Imandrite |
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relectron=2.88 gm/cc |
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| Fermion Index = 0.01305 Boson Index = 0.98695 |
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PEImandrite = 4.59 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Imandrite is Not Radioactive |
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Imandrite Classification |
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| 61.1.2b.1 (61)Cyclosilicate Six-Membered Rings | |||
| (61.1)with [Si6O18] rings; possible (OH) and Al substitution | |||
| (61.1.2b)Lovozerite group (Ortho and MON subgroup) | |||
| VIII/E.16-10 VIII - Silicates | |||
| VIII/E - Cyklosilicates, six rings [Si6O18]12- | |||
| VIII/E.16 - Lovozerite group | |||
Other Imandrite Information |
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| NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Imandrite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Imandrite using: Visit our Advertisers for Imandrite : Translate Imandrite Mineral Data : Ask about Imandrite here : Print or Cut-and-Paste your Imandrite Specimen Label here :
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