Lomonosovite Mineral Data (original) (raw)

General Lomonosovite Information

Help on Chemical  Formula: Chemical Formula:

Na5Ti2O2(Si2O7)(PO4)

Help on Composition: Composition:

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

Help on Empirical Formula: Empirical Formula:

Na5Ti2O2Si2O7(PO4)

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1950

Help on Locality: Locality:

Lovozero alkaline complex, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Mikhail V. Lomonosov (1711-1765), Russian mineralogist and naturalist.

Help on Name Pronunciation: Name Pronunciation:

Lomonosovite + Pronunciation Say LOMONOSOVITE

Help on Synonym: Synonym:

ICSD 34069

PDF 15-155

Lomonosovite Image

Click Here for Larger Lomonosovite Image in a New Browser Window Images:

Click Here for Larger 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

Help on Axial Ratios: Axial Ratios:

a:b:c =0.7721:1:2.0393

Help on Cell Dimensions: Cell Dimensions:

a = 5.49, b = 7.11, c = 14.5, Z = 2; alpha = 101°, beta = 96°, gamma = 90° V = 552.55 Den(Calc)= 3.04

Help on Crystal System: Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.83(1), 1.778(0.9), 1.84(0.8),

Click Here for Large Lomonosovite Structure Window Crystal Structure:

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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

Help on Cleavage: Cleavage:

{100} Perfect

Help on Color: Color:

Dark brown, Pink violet, Black.

Help on Density: Density:

3.12 - 3.15, Average = 3.13

Help on Diaphaneity: Diaphaneity:

Transparent to Subopaque

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Habit: Habit:

Tabular - Form dimensions are thin in one direction.

Help on Hardness: Hardness:

3-4 - Calcite-Fluorite

Help on Luster: Luster:

Vitreous - Adamantine

Help on Streak: Streak:

brown

Optical Properties of Lomonosovite

Help on Gladstone-Dale: Gladstone-Dale:

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

Help on Optical Data: Optical Data:

Biaxial (-), a=1.67, b=1.75, g=1.778, bire=0.1080, 2V(Calc)=58, 2V(Meas)=56.

Help on Pleochroism (x): Pleochroism (x):

nearly colorless or nearly colorless.

Help on Pleochroism (y): Pleochroism (y):

dark brown or lilac.

Help on Pleochroism (z): Pleochroism (z):

yellowish brown or yellowish brown.

Calculated Properties of Lomonosovite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Lomonosovite =3.04 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PELomonosovite = 4.19 barns/electron
U=PELomonosovite x rElectron Density= 12.38 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lomonosovite is Not Radioactive

Lomonosovite Classification

Help on  Dana Class: Dana Class:

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

Help on  Strunz Class: Strunz Class:

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

Help on References: References:

NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Dana8)

Help on See Also: See Also:

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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Ask about Lomonosovite here :
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Print or Cut-and-Paste your Lomonosovite Specimen Label here :

Lomonosovite

Na5Ti2O2(Si2O7)(PO4)
Dana No: 56.04.01.01 Strunz No: 09.BE.32
Locality:

Notes: