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Tiettaite Mineral Data |
General Tiettaite Information |
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(Na,K)17Fe+++TiSi16O29(OH)30•2(H2O) | |
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Molecular Weight = 2,066.91 gm | |
Potassium 13.24 % K 15.95 % K2O | ||
Sodium 11.12 % Na 14.99 % Na2O | ||
Titanium 2.32 % Ti 3.86 % TiO2 | ||
Iron 2.70 % Fe 3.86 % Fe2O3 | ||
Silicon 21.74 % Si 46.51 % SiO2 | ||
Hydrogen 1.66 % H 14.82 % H2O | ||
Oxygen 47.22 % O | ||
______ ______ | ||
100.00 % 100.00 % = TOTAL OXIDE | ||
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Na10K7Fe3+TiSi16O29(OH)30•2(H2O) | |
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Ultra-agpaitic pegmatites. | |
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Approved IMA 1993 | |
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Mt. Ruasvumchorr and Mt. Koashva, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data. | |
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Named from the Finnish "tietta", science or knowledge, for the first science station in Khibiny. | |
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Tiettaite + Pronunciation ![]() |
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IMA1991-013 | |
Tiettaite Crystallography |
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a:b:c =2.699:1:1.5513 | |
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a = 29.77, b = 11.03, c = 17.111, Z = 4; V = 5,618.62 Den(Calc)= 2.44 | |
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Orthorhombic Space Group: C mcm,C mc21,C 2mc | |
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By Intensity(I/Io): 10.38(1), 2.773(0.9), 3.097(0.8), | |
Physical Properties of Tiettaite |
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{100} Perfect, {010} Perfect | |
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Colorless, Grayish white, Dark gray. | |
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2.42 | |
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Transparent | |
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Even - Flat surfaces (not cleavage) fractured in an even pattern. | |
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Aggregates - Made of numerous individual crystals or clusters. | |
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3 - Calcite | |
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Vitreous - Silky | |
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white | |
Optical Properties of Tiettaite |
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CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2238,KPDmeas= 0.2257,KC= 0.2342 Ncalc = 1.57 |
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Biaxial (-), a=1.53-1.532, b=1.548-1.549, g=1.559, bire=0.0270-0.0290, 2V(Calc)=74, 2V(Meas)=79. Dispersion r < v moderate. | |
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none. | |
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none. | |
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none. | |
Calculated Properties of Tiettaite |
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Bulk Density (Electron Density)=2.43 gm/cc note: Specific Gravity of Tiettaite =2.42 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PETiettaite = 3.51 barns/electron U=PETiettaite x relectron= 8.51 barns/cc. |
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GRapi = 191.70 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Tiettaite |
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Tiettaite Classification |
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78.06.04.01 (78)Unclassified silicates | |
(78.06)possible tectosilicates | ||
(78.06.04)Dana Group | ||
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09.HA.90 09 - SILICATES (Germanates) | |
09.H - Unclassified Silicates | ||
09.HA -With alkali and alkali-earth Elements | ||
Other Tiettaite Information |
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NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |
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Links to other databases for Tiettaite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Tiettaite using: Visit our Advertisers for Tiettaite : Ask about Tiettaite here : Print or Cut-and-Paste your Tiettaite Specimen Label here :
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