Lomonosovite Mineral Data (original) (raw)
General Lomonosovite Information
Na5Ti2O2(Si2O7)(PO4)
Molecular Weight = 505.85 gm
Sodium 22.72 % Na 30.63 % Na2O
Titanium 18.93 % Ti 31.58 % TiO2
Silicon 11.10 % Si 23.76 % SiO2
Phosphorus 6.12 % P 14.03 % P2O5
Oxygen 41.12 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Na5Ti2O2Si2O7(PO4)
Valid Species (Pre-IMA) 1950
Lovozero alkaline complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Named for Mikhail V. Lomonosov (1711-1765), Russian mineralogist and naturalist.
ICSD 34069
PDF 15-155
Lomonosovite Image
Lomonosovite Comments: Aegerine schist with reddish crystalline grains of lomonosovite. Location: Ilimaussaq, Kvanefjeld, Greenland.Scale: Picture size 0.5 cm. © John Veevaert |
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Lomonosovite Crystallography
a:b:c =0.7721:1:2.0393
a = 5.49, b = 7.11, c = 14.5, Z = 2; alpha = 101°, beta = 96°, gamma = 90° V = 552.55 Den(Calc)= 3.04
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
By Intensity(I/Io): 2.83(1), 1.778(0.9), 1.84(0.8),
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| | Belov N V , Gavrilova G S , Solov eva L P , Khalilov A D , Soviet Physics Doklady , 22 (1977) p.422-424, The refined structure of lomonosovite | | ------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Lomonosovite
{100} Perfect
Dark brown, Pink violet, Black.
3.12 - 3.15, Average = 3.13
Transparent to Subopaque
Brittle - Uneven - Very brittle fracture producing uneven fragments.
Tabular - Form dimensions are thin in one direction.
3-4 - Calcite-Fluorite
Vitreous - Adamantine
brown
Optical Properties of Lomonosovite
CI meas= 0.092 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.241,KPDmeas= 0.2337,KC= 0.2574
Ncalc = 1.78 - 1.81
Biaxial (-), a=1.67, b=1.75, g=1.778, bire=0.1080, 2V(Calc)=58, 2V(Meas)=56.
nearly colorless or nearly colorless.
dark brown or lilac.
yellowish brown or yellowish brown.
Calculated Properties of Lomonosovite
Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Lomonosovite =3.04 gm/cc.
Fermion Index = 0.02
Boson Index = 0.98
PELomonosovite = 4.19 barns/electron
U=PELomonosovite x rElectron Density= 12.38 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lomonosovite is Not Radioactive
Lomonosovite Classification
56.04.01.01 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
(56.04)with [Si2O7] with phosphate, water
(56.04.01)Lomonosovite group
56.04.01.01 Lomonosovite Na5Ti2O2(Si2O7)(PO4) P1 1
56.04.01.02 Polyphite-VIII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1
56.04.01.03 Quadruphite-VIII Na14CaMgTi4(Si2O7)2(PO4)4O4F2 P1 1
56.04.01.04 Sobolevite Na11(Na,Ca)4(Mg,Mn)Ti4(Si4O12)(PO4)4O5F3 P1 1
09.BE.32 09 - SILICATES (Germanates)
09.B - Sorosilicates
09.BE -Si2O7 groups with additional anions;
09.BE.32 Lomonosovite Na5Ti2O2(Si2O7)(PO4) P1 1
Other Lomonosovite Information
NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Dana8)
Links to other databases for Lomonosovite :
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
15 - WWW-MINCRYST
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Lomonosovite
Na5Ti2O2(Si2O7)(PO4)
Dana No: 56.04.01.01 Strunz No: 09.BE.32
Locality:
Notes: