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Olgite

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Formula:
(Sr,Ba)(Na,Sr,REE)2Na(PO4)2
System:
Trigonal
Colour:
Bright blue, bluish green
Hardness:
Name:
Named by Khomyakov et al. in 1980 in honor of Olga Anisimovne-Vorobiova (1902-1974), Russian mineralogist.
("Olgite" may perhaps in future become a series name, with Ba- and Sr- endmembers.) See also http://www.mindat.org/mesg-14-95789.html

Classification of Olgite

Approved
8.AC.40

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
38.1.3.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
1 : ABXO4
19.5.7

19 : Phosphates
5 : Phosphates of Sr and Ba
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http://www.mindat.org/min-2973.html
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Type Occurrence of Olgite

Year of Discovery:
1980
Geological Setting of Type Material:
Nepheline syenite pegmatite.
Associated Minerals at Type Locality:

Physical Properties of Olgite

Vitreous
Diaphaneity (Transparency):
Translucent
Colour:
Bright blue, bluish green
Hardness (Mohs):
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.94 g/cm3 (Measured)    3.904 g/cm3 (Calculated)

Crystallography of Olgite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Cell Parameters:
a = 5.5606Å, c = 7.045Å
Ratio:
a:c = 1 : 1.267
Unit Cell Volume:
V 188.65 ų
Z:
1
X-Ray Powder Diffraction Data:
d-spacingIntensity
6.99 (30)
3.97 (40)
2.84 (100)
2.76 (100)
2.27 (30)
1.982 (60)
1.647 (30)
1.607 (40)
Comments:
ICDD 33-1212

Optical Data of Olgite

Type:
Uniaxial (-)
RI values:
nω = 1.623 nε = 1.619
Birefringence:
0.004
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
Parallel

Chemical Properties of Olgite

Formula:
(Sr,Ba)(Na,Sr,REE)2Na(PO4)2
Essential elements:
All elements listed in formula:

Relationship of Olgite to other Species

8.AC.05HowardevansiteNaCuFe2(VO4)3
8.AC.10Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
8.AC.10ArseniopleiteNaCaMn2+(Mn2+,Mg)2(AsO4)3
8.AC.10Caryinite(Na,Pb)(Ca,Na)(Ca,Mn2+)(Mn2+,Mg,Fe3+)2(AsO4)3
8.AC.10Ferroalluaudite(Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3
8.AC.10HagendorfiteNaCaMn2+Fe22+(PO4)3
8.AC.10JohilleriteNa(Mg,Zn)3Cu(AsO4)3
8.AC.10Maghagendorfite(□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3
8.AC.10NickenichiteNa0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3
8.AC.10VaruliteNaCaMn2+Mn22+(PO4)3
8.AC.10FerrohagendorfiteNaCaFe2+Fe22+(PO4)3
8.AC.10BradaczekiteNaCu4(AsO4)3
8.AC.10YazganiteNaFe23+(Mg,Mn2+)(AsO4)3 · H2O
8.AC.10GroatiteNaCaMn2(PO4)(HPO4)2
8.AC.15BobfergusoniteNa2Mn5FeAl(PO4)6
8.AC.15Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3
8.AC.15QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3
8.AC.15Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3
8.AC.15Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3
8.AC.15Ferrorosemaryite◻NaFe2+Fe3+Al(PO4)3
8.AC.15Qingheiite-(Fe2+)Na2Fe2+MgAl(PO4)3
8.AC.18ManitobaiteNa16Mn2+ 25Al8(PO4)30
8.AC.20MarićiteNaFe2+(PO4)
8.AC.25BerzeliiteNaCa2(Mg,Mn2+)2(AsO4)3
8.AC.25Manganberzeliite(Ca,Na)3(Mn2+,Mg)2(AsO4)3
8.AC.25Palenzonaite(Ca,Na)3CaMn22+(VO4)3
8.AC.25SchäferiteCa2NaMg2(VO4)3
8.AC.30BrianiteNa2CaMg(PO4)2
8.AC.35Vitusite-(Ce)Na3(Ce,La,Nd)(PO4)2
8.AC.40Bario-olgite(Ba,Sr)(Na,Sr,REE)2Na(PO4)2 ·
8.AC.45StrontiowhitlockiteSr9Mg(PO4)6(HPO4)
8.AC.45WhitlockiteCa9Mg(PO4)6(HPO4)
8.AC.45MerrilliteCa9NaMg(PO4)7
8.AC.45TuiteCa3(PO4)2
8.AC.45FerromerrilliteCa9NaFe2+(PO4)7
8.AC.45BobdownsiteCa9Mg(PO4)6(PO3F)
8.AC.50Chladniite{Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36
8.AC.50Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36
8.AC.50JohnsomervilleiteNa10Ca6Mg18Fe25(PO4)36
8.AC.50Galileiite{Fe2+}{Na8}{Fe42+Na4}{Fe432+}(PO4)36
8.AC.50Stornesite-(Y){(Y, Ca)}{Na62}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36
8.AC.50XenophylliteNa4Fe72+(PO4)6
8.AC.55HarrisoniteCa(Fe2+,Mg)6(PO4)2(SiO4)2
8.AC.60KosnariteKZr2(PO4)3
8.AC.65Panethite(Na,Ca)2(Mg,Fe2+)2(PO4)2
8.AC.70StanfielditeCa7Ca2Mg9(PO4)12
8.AC.75RonneburgiteK2MnV4O12
8.AC.80Tillmannsite(Ag3Hg)(VO4,AsO4)
8.AC.85FilatoviteK(Al,Zn)2(As,Si)2O8
19.5.1StrontiowhitlockiteSr9Mg(PO4)6(HPO4)
19.5.2Belovite-(Ce)NaCeSr3(PO4)3F
19.5.3GoyaziteSrAl3(PO4)(PO3OH)(OH)6
19.5.4GoedkeniteSr2Al(PO4)2(OH)
19.5.5Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4
19.5.6NabaphiteNaBaPO4 · 9H2O
19.5.8NastrophiteNa(Sr,Ba)PO4 · 9H2O
19.5.9JagoweriteBaAl2(PO4)2(OH)2
19.5.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6
19.5.11PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3
19.5.12CuretoniteBa(Al,Ti)(PO4)(OH,O)F
19.5.13Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3
19.5.14KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3
19.5.15PerloffiteBa(Mn2+,Fe2+)2Fe23+(PO4)3(OH)3

Other Names for Olgite

Name in Other Languages:
German:Olgit
Russian:Ольгит
Simplified Chinese:磷钠锶石
Spanish:Olgita
Traditional Chinese:磷鈉鍶石

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Olgite

Reference List:
Khomyakov, A.P., Semenov, E.I., Shumyatskaya, N.G., Timoshenkov, I.M., Laputina, I.P., and Smol'yaninova, N.N. (1980) Olgite, Na(Sr,Ba)PO4 - a new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva

American Mineralogist (1981): 66: 438 (abstract).

Sokolova, E.V., Egorov-Tismenko, Yu.K., Yamnova, N.A., and Simonov, M.A. (1984) The crystal structure of olgite Na(Sr0.52Ba0.48)(Sr0.56Na0.42)(Na0.81Sr0.19)[PO3.40][P0.76O3.88]. Soviet Physics – Crystallography: 29: 633-635.

Sokolova, E., Hawthorne, F.C., and Khomyakov, A.P. (2005), Refinement of the crystal structure and revision of the chemical formula of olgite: (Ba,Sr)(Na,Sr,REE)2Na(PO4)2. Canadian Mineralogist: 43: 1521-1526.

http://www.mindat.org/mesg-14-95789.html

Internet Links for Olgite

Localities for Olgite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
Cempírek, J.: Hydroxylherderit z Rožné. Minerál, 2001, roč. 9, č. 5, s. 328-329
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Lovozero Massif
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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