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Murmanite Mineral Data + |
General Murmanite Information |
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| Na3(Ti,Nb)4(Si2O7)2O4·4(H2O) | |||
| Molecular Weight = 750.89 gm | |||
| Sodium 9.18 % Na 12.38 % Na2O | |||
| Titanium 22.96 % Ti 38.30 % TiO2 | |||
| Niobium 4.95 % Nb 7.08 % Nb2O5 | |||
| Silicon 14.96 % Si 32.01 % SiO2 | |||
| Hydrogen 1.07 % H 9.60 % H2O | |||
| Oxygen 46.88 % O | |||
| ______ ______ | |||
| 100.00 % 99.36 % = TOTAL OXIDE | |||
| Na3Ti3.6Nb0.4(Si2O7)2O4·4(H2O) | |||
| Supergene alteration product of lomonsovite. | |||
| Valid Species (Pre-IMA) 1923 | |||
| Lu Javr and Hibina districts, Lovozero Massif, Murmansk, Kola peninsula, Russia. Link to MinDat.org Location Data. | |||
| Named apparently for the locality. | |||
| ICSD 62278 | |||
| PDF 40-479 | |||
Murmanite Image | |||
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Murmanite Crystallography |
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| a:b:c =0.9967:1:1.3368 | |||
| a = 8.7, b = 8.728, c = 11.668, Z = 2; alpha = 94.31°, beta = 98.62°, gamma = 105.62° V = 841.25 Den(Calc)= 2.96 | |||
| Triclinic - PedialH-M Symbol (1) Space Group: P1 ? | |||
| By Intensity(I/Io): 11.6(1), 2.86(0.8), 5.7(0.6), | |||
Physical Properties of Murmanite |
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| [001] Perfect | |||
| Pink, Bright pink, Silvery, Yellow, Brown. | |||
| 2.64 - 2.84, Average = 2.74 | |||
| Transparent to translucent to opaque | |||
| Brittle - Uneven - Very brittle fracture producing uneven fragments. | |||
| Massive - Uniformly indistinguishable crystals forming large masses. | |||
| Tabular - Form dimensions are thin in one direction. | |||
| 2.5-3 - Finger Nail-Calcite | |||
| Vitreous - Greasy | |||
| white | |||
Optical Properties of Murmanite |
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| CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.114 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2589,KPDmeas= 0.2797,KC= 0.2922 |
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| Biaxial (-), a=1.682-1.735, b=1.765-1.77, g=1.807-1.839, bire=0.1040-0.1250, 2V(Calc)=66-74, 2V(Meas)=57-64. Dispersion r > v weak. | |||
| pale rose or rose. | |||
| light brown or light yellowish brown. | |||
| dark brown or violet brown. | |||
Calculated Properties of Murmanite |
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relectron=2.69 gm/cc |
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| Fermion Index = 0.03689 Boson Index = 0.96311 |
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PEMurmanite = 11.62 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Murmanite is Not Radioactive |
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Murmanite Classification |
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| 56.2.7.2 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | |||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.7)Murmanite group | |||
| VIII/C.14-40 VIII - Silicates | |||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.14 - Fresnoite - Belkovite series | |||
Other Murmanite Information |
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| NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |||
| Links to other databases for Murmanite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -theimage 16 -École des Mines de Paris Search for Murmanite using: Visit our Advertisers for Murmanite : Translate Murmanite Mineral Data : Ask about Murmanite here : Print or Cut-and-Paste your Murmanite Specimen Label here :
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