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Stronadelphite

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About StronadelphiteHide

Formula:
Sr5(PO4)3F
Colour:
colourless with a pale greenish tint
Hardness:
5
Specific Gravity:
3.915 (Calculated)
Crystal System:
Hexagonal
Name:
For the element strontium and αδελφóσ, Greek for “brother”, as the full strontium analogue of fluorapatite.
Isostructural with:

Classification of StronadelphiteHide

Approved
Approval Year:
2008
8.BN.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
N : With only large cations, (OH, etc.):RO4 = 0.33:1
41.8.1.4

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
8 : A5(XO4)3Zq

Physical Properties of StronadelphiteHide

Transparency:
Transparent
Colour:
colourless with a pale greenish tint
Hardness:
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.915 g/cm3 (Calculated)

Optical Data of StronadelphiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.630() nε = 1.623(1)
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of StronadelphiteHide

Formula:
Sr5(PO4)3F

Crystallography of StronadelphiteHide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 9.845(7) Å, c = 7.383(4) Å
Ratio:
a:c = 1 : 0.75
Unit Cell V:
619.72 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.71 (30)
3.21 (40)
2.940 (100)
2.823 (35)
2.009 (50)
1.955 (45)
1.831 (50)
1.500 (30)

Type Occurrence of StronadelphiteHide

General Appearance of Type Material:
hexagonal, prismatic to acicular crystals up to 0.1 × 0.1 × 2 mm, combined in sheaf-like clusters up to 1 × 2 mm embedded in natrolite.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, with the registration number 3693/1.
Geological Setting of Type Material:
peralkaline pegmatite
Associated Minerals at Type Locality:

Synonyms of StronadelphiteHide

Relationship of Stronadelphite to other SpeciesHide

Other Members of this group:
AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
Apatite"Apatite" is a field term for unidentified calcium phosphate members of the apatite group.
HydroxylpyromorphitePb5(PO4)3(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
MimetitePb5(AsO4)3ClHex. 6/m : P63/m
OxypyromorphitePb10(PO4)6O
PieczkaiteMn5(PO4)3ClHex. 6/m : P63/m
PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
TurneaureiteCa5(AsO4)3ClHex.
Unnamed (F-analogue of Pyromorphite)Pb5(PO4)3F
Unnamed (OH-analogue of Mimetite)Pb5(AsO4)3(OH)
Unnamed (V-dominant analogue of Fluorapatite)Ca5(VO4,PO4,SO4)3F
VanadinitePb5(VO4)3ClHex. 6/m : P63/m

Related Minerals - Nickel-Strunz GroupingHide

8.BN.05AlforsiteBa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
8.BN.05Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)Hex.
8.BN.05Carbonate-rich HydroxylapatiteCa5(PO4,CO3)3(OH,O)Hex.
8.BN.05ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
8.BN.05Mimetite-MPb5(AsO4)3ClMon. 2/m : P21/b
8.BN.05Johnbaumite-MCa5(AsO4)3OHMon. 2/m : P21/m
8.BN.05FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
8.BN.05HedyphaneCa2Pb3(AsO4)3ClHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
8.BN.05JohnbaumiteCa5(AsO4)3OHHex. 6/m : P63/m
8.BN.05MimetitePb5(AsO4)3ClHex. 6/m : P63/m
8.BN.05MorelanditeCa2Ba3(AsO4)3Cl
8.BN.05PyromorphitePb5(PO4)3ClHex. 6/m : P63/m
8.BN.05FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m
8.BN.05SvabiteCa5(AsO4)3FHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
8.BN.05TurneaureiteCa5(AsO4)3ClHex.
8.BN.05VanadinitePb5(VO4)3ClHex. 6/m : P63/m
8.BN.05Belovite-(La)NaLaSr3(PO4)3FTrig. 3 : P3
8.BN.05Deloneite(Na0.5REE0.25Ca0.25)(Ca0.75REE0.25)Sr1.5(CaNa0.25REE0.25)(PO4)3F0.5(OH)0.5Trig.
8.BN.05FluorcaphiteSrCaCa3(PO4)3FHex. 6/m : P63/m
8.BN.05Kuannersuite-(Ce)NaCeBa3(PO4)3F0.5Cl0.5Trig. 3 : P3
8.BN.05Hydroxylapatite-MCa5(PO4)3OHMon. 2/m : P21/b
8.BN.05PhosphohedyphaneCa2Pb3(PO4)3ClHex. 6/m : P63/m
8.BN.05FluorphosphohedyphaneCa2Pb3(PO4)3FHex. 6/m : P63/m
8.BN.05Carlgieseckeite-(Nd)NaNdCa3(PO4)3FTrig. 3 : P3
8.BN.05Miyahisaite(Sr,Ca)2Ba3(PO4)3F Hex. 6/m : P63/m
8.BN.10ArctiteNa2Ca4(PO4)3FTrig. 3m (3 2/m) : R3m

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

41.8.1.1FluorapatiteCa5(PO4)3FHex. 6/m : P63/m
41.8.1.2ChlorapatiteCa5(PO4)3ClHex. 6/m : P63/m
41.8.1.3HydroxylapatiteCa5(PO4)3(OH)Hex. 6/m : P63/m
41.8.1.4Carbonate-rich FluorapatiteCa5(PO4,CO3)3(F,O)Hex.
41.8.1.6Belovite-(Ce)NaCeSr3(PO4)3FTrig. 3 : P3
41.8.1.7FluorstrophiteSrCaSr3(PO4)3FHex. 6/m : P63/m

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 StronadelphiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J., White, T.J. (2010) Nomenclature of the Apatite Supergroup Minerals. European Journal of Mineralogy, 22: 163-179.
Pekov, I. V., Britvin, S. N., Zubkova, N. V., Pushcharovsky, D. Y., Pasero, M., & Merlino, S. (2010). Stronadelphite, Sr5(PO4)3F, a new apatite-group mineral. European Journal of Mineralogy, 22(6), 869-874.
Zhai, S., Shieh, S. R., Xue, W., & Xie, T. (2015). Raman spectra of stronadelphite Sr5(PO4)3F at high pressures. Physics and Chemistry of Minerals, 42(7), 579-585.
Victoria L. Weidner, Molly C. Carney, Demetra V. Schermerhorn, Jill D. Pasteris, Claude H. Yoder (2015): A-type substitution in carbonated strontium fluor-, chlor- and hydroxylapatites. Mineralogical Magazine, 79, 399-412.

Internet Links for StronadelphiteHide

Localities for StronadelphiteHide

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.
Brazil
 
  • Minas Gerais
    • Poços de Caldas alkaline complex
      • Poços de Caldas
Azzi, Andrezza de Almeida (2017) Rare Minerals from Poços de Caldas, MG
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
Yakovenchuk V N, Ivanyuk G Y, Pakhomovsky Y A, Selivanova E A, Korchak J A, Nikolaev A P (2010) Strontiofluorite, SrF2, a new mineral species from the Khibiny Massif, Kola Peninsula, Russia. The Canadian Mineralogist 48, 1487-1492
        • Kukisvumchorr Mt
IMA website - May 2008 approvals
Mineral and/or Locality  
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