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Olgite

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Formula:
(Sr,Ba)(Na,Sr,REE)2Na(PO4)2
Colour:
Bright blue, bluish green
Lustre:
Vitreous
Hardness:
Specific Gravity:
3.94
Crystal System:
Trigonal
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


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Classification of OlgiteHide

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

Physical Properties of OlgiteHide

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

Optical Data of OlgiteHide

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 OlgiteHide

Formula:
(Sr,Ba)(Na,Sr,REE)2Na(PO4)2
IMA Formula:
Na(Na,Sr)2Ba(PO4)2

Crystallography of OlgiteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Cell Parameters:
a = 5.5606 Å, c = 7.045 Å
Ratio:
a:c = 1 : 1.267
Unit Cell V:
188.65 ų
Z:
1

X-Ray Powder DiffractionHide

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

Type Occurrence of OlgiteHide

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

Synonyms of OlgiteHide

Other Language Names for OlgiteHide

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

Related Minerals - Nickel-Strunz GroupingHide

8.AC.WopmayiteCa6Na3□Mn(PO4)3(PO3OH)4 Trig. 3m : R3c
8.AC.05HowardevansiteNaCuFe2(VO4)3Tric. 1 : P1
8.AC.10Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3Mon.
8.AC.10Arseniopleite(Ca,Na)NaMn2+(Mn2+,Mg,Fe2+)2(AsO4)3Mon. 2/m : P2/b
8.AC.10Caryinite(Na,Pb)(Ca,Na)CaMn2+2(AsO4)3Mon. 2/m
8.AC.10Ferroalluaudite(Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3
8.AC.10HagendorfiteNaCaMn2+Fe2+2(PO4)3Mon. 2/m : B2/b
8.AC.10JohilleriteNa(Mg,Zn)3Cu(AsO4)3Mon. 2/m : B2/b
8.AC.10Maghagendorfite(□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3Mon.
8.AC.10NickenichiteNa0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3Mon. 2/m : B2/b
8.AC.10VaruliteNaCaMn2+Mn2+2(PO4)3Mon. 2/m : B2/b
8.AC.10FerrohagendorfiteNaCaFe2+Fe2+2(PO4)3Mon.
8.AC.10BradaczekiteNaCu4(AsO4)3Mon. 2/m : B2/b
8.AC.10YazganiteNaFe3+2(Mg,Mn2+)(AsO4)3 · H2OMon. 2/m : B2/b
8.AC.10GroatiteNaCaMn2(PO4)(HPO4)2Mon. 2/m : B2/b
8.AC.15BobfergusoniteNa2Mn5FeAl(PO4)6Mon. 2/m : P2/b
8.AC.15Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3Mon. 2/m : P21/b
8.AC.15QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3Mon. 2/m : P21/b
8.AC.15Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3Mon. 2/m : P21/b
8.AC.15Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3Mon. 2/m
8.AC.15Ferrorosemaryite◻NaFe2+Fe3+Al(PO4)3Mon.
8.AC.15Qingheiite-(Fe2+)Na2Fe2+MgAl(PO4)3Mon. 2/m : P21/m
8.AC.18ManitobaiteNa16Mn2+ 25Al8(PO4)30Mon. m : Pb
8.AC.20MarićiteNaFe2+(PO4)Orth. mmm (2/m 2/m 2/m) : Pmna
8.AC.25Berzeliite(NaCa2)Mg2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.25ManganberzeliiteNaCa2Mn2+2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.25Palenzonaite(Ca,Na)3CaMn2+2(VO4)3Iso. m3m (4/m 3 2/m) : Ia3d
8.AC.25SchäferiteCa2NaMg2(VO4)3Iso.
8.AC.30BrianiteNa2CaMg(PO4)2Mon. 2/m : P21/b
8.AC.35Vitusite-(Ce)Na3(Ce,La,Nd)(PO4)2Orth. mm2 : Pca21
8.AC.40Bario-olgite(Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · Trig. 3 : P3
8.AC.45StrontiowhitlockiteSr9Mg(PO4)6(HPO4)Trig. 3m : R3c
8.AC.45WhitlockiteCa9Mg(PO4)6(HPO4)Trig. 3m : R3c
8.AC.45MerrilliteCa9NaMg(PO4)7Trig. 3m : R3m
8.AC.45TuiteCa3(PO4)2Trig. 3m (3 2/m) : R3m
8.AC.45FerromerrilliteCa9NaFe2+(PO4)7Trig. 3m : R3c
8.AC.45BobdownsiteCa9Mg(PO4)6(PO3F)Trig. 3m : R3c
8.AC.50Chladniite{Ca}{Na8}{Ca4Na4}{(Mg,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50JohnsomervilleiteNa10Ca6Mg18Fe25(PO4)36Trig.
8.AC.50Galileiite{Fe2+}{Na8}{Fe2+4Na4}{Fe2+43}(PO4)36Trig. 3 : R3
8.AC.50Stornesite-(Y){(Y, Ca)}{Na62}{(Ca,Na)8}{(Mg,Fe2+)43}(PO4)36Trig. 3 : R3
8.AC.50XenophylliteNa4Fe2+7(PO4)6Tric. 1 : P1
8.AC.55HarrisoniteCa(Fe2+,Mg)6(PO4)2(SiO4)2Trig.
8.AC.60KosnariteKZr2(PO4)3Trig. 3m (3 2/m) : R3c
8.AC.65Panethite(Na,Ca)2(Mg,Fe2+)2(PO4)2Mon. 2/m : P21/b
8.AC.70StanfielditeCa4Mg5(PO4)6Mon.
8.AC.75RonneburgiteK2MnV4O12Mon. 2/m
8.AC.80Tillmannsite(Ag3Hg)(VO4,AsO4)Tet. 4 : I4
8.AC.85FilatoviteK(Al,Zn)2(As,Si)2O8Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

38.1.3.2Bario-olgite(Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · Trig. 3 : P3

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.5.1StrontiowhitlockiteSr9Mg(PO4)6(HPO4)Trig. 3m : R3c
19.5.2Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
19.5.3GoyaziteSrAl3(PO4)(PO3OH)(OH)6Trig. 3m (3 2/m) : R3m
19.5.4GoedkeniteSr2Al(PO4)2(OH)Mon. 2/m : P21/m
19.5.5Palermoite(Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4Orth.
19.5.6NabaphiteNaBaPO4 · 9H2OIso.
19.5.8NastrophiteNa(Sr,Ba)PO4 · 9H2O
19.5.9JagoweriteBaAl2(PO4)2(OH)2Tric.
19.5.10GorceixiteBaAl3(PO4)(PO3OH)(OH)6Mon. m : Bm
19.5.11PenikisiteBa(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3Mon. 2/m : P21/m
19.5.12CuretoniteBa(Al,Ti)(PO4)(OH,O)FMon. 2/m
19.5.13Bjarebyite(Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3Mon.
19.5.14KulaniteBa(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3Mon.
19.5.15PerloffiteBa(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3Mon. 2/m : P21/m

Fluorescence of OlgiteHide

Not fluorescent.

Other InformationHide

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 OlgiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

Internet Links for OlgiteHide

Localities for OlgiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
Cempírek, J.: Hydroxylherderit z Rožné. Minerál, 2001, roč. 9, č. 5, s. 328-329
Italy
 
  • Umbria
    • Terni Province
      • San Venanzo
Sharygin, V. V., Pekov, I. V., Zubkova, N. V., Khomyakov, A. P., Stoppa, F., & Pushcharovsky, D. Y. (2013). Umbrianite, K7Na2Ca2 [Al3Si10O29] F2Cl2, a new mineral species from melilitolite of the Pian di Celle volcano, Umbria, Italy. European Journal of Mineralogy, 25(4), 655-669.
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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