Mineralogy Database

Olgite Mineral Data

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General Olgite Information

Help on Chemical  Formula: Chemical Formula: Na(Sr,Ba)PO4
Help on Composition: Composition: Molecular Weight = 227.95 gm
   Barium      27.11 %  Ba   30.27 % BaO
   Sodium      10.09 %  Na   13.59 % Na2O
   Strontium   21.14 %  Sr   25.00 % SrO
   Phosphorus  13.59 %  P    31.14 % P2O5
   Oxygen      28.08 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaSr0.55Ba0.45(PO4)
Help on Environment: Environment: Nepheline syenite pegmatite. Olgite is now the series name for bario-olgite and strontio-olgite
Help on IMA Status: IMA Status: Discredited IMA 2008 - Approved IMA 1980
Help on Locality: Locality: Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Olga Anisimovne-Vorobiova (1902-1974), Russian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Olgite Say OLGITE
Help on Synonym: Synonym: ICSD 20962
  Olgite I
  PDF 33-1212

Olgite Image

Click Here for Larger   Image in a New Browser Window Images:
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Comments: Green mm-sized olgite crystals in matrix.
Location: Kedykverpakhk Mt., Lovozero, Kola, Russia. Scale: Not Given.
© Sergey Vasiliev / Systematic Mineralogy

Olgite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.2661
Help on Cell Dimensions: Cell Dimensions: a = 5.558, c = 7.037, Z = 2; V = 188.26 Den(Calc)= 4.02
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.763(1), 2.842(1), 1.982(0.63),

Physical Properties of Olgite

Help on Color: Color: Blue, Blue green.
Help on Density: Density: 3.94
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Olgite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1545,KPDmeas= 0.1576,KC= 0.1578
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Uniaxial (-), e=1.619, w=1.623, bire=0.0040.

Calculated Properties of Olgite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Olgite =3.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEOlgite = 144.28 barns/electron
U=PEOlgite x rElectron Density= 519.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Olgite is Not Radioactive

Olgite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.01)A+ B++ XO4
  (38.01.03)Dana Group Olgite? Na(Sr,Ba)PO4 P 3m1 3 2/m Bario-olgite! Na(Ba,Sr,Na,REE)PO4 P 3m1 3 2/m
Help on  Strunz Class: Strunz Class: 08.AC.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AC -With medium-sized and large cations
08.AC.40 Olgite? Na(Sr,Ba)PO4 P 3m1 3 2/m
08.AC.40 Bario-olgite! Na(Ba,Sr,Na,REE)PO4 P 3m1 3 2/m

Other Olgite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Olgite :
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

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Dana No: Strunz No: 08.AC.40





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