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Parafransoletite

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About ParafransoletiteHide

Formula:
Ca3Be2(PO4)2(HPO4)2 · 4H2O
Colour:
Colorless, White
Lustre:
Vitreous, Silky
Hardness:
Specific Gravity:
2.54
Crystal System:
Triclinic
Name:
Named for its dimorphous relationship with fransoletite.
This page provides mineralogical data about Parafransoletite.


Classification of ParafransoletiteHide

Approved
Approval Year:
1989
8.CA.05

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
Dana 7th ed.:
40.5.2.1
40.5.2.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O

Physical Properties of ParafransoletiteHide

Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
Colorless, White
Streak:
White
Hardness:
2½ on Mohs scale
Cleavage:
None Observed
Density:
2.54 g/cm3 (Measured)    2.27 g/cm3 (Calculated)

Optical Data of ParafransoletiteHide

Type:
Biaxial (+)
RI values:
nα = 1.562 nβ = 1.564 nγ = 1.588
2V:
Measured: 33° , Calculated: 34°
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
strong

Chemical Properties of ParafransoletiteHide

Formula:
Ca3Be2(PO4)2(HPO4)2 · 4H2O
IMA Formula:
Ca3Be2(PO4)2(PO3OH)2 · 4H2O

Crystallography of ParafransoletiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.32 Å, b = 7.69 Å, c = 7.06 Å
α = 94.9°, β = 96.82°, γ = 101.86°
Ratio:
a:b:c = 0.952 : 1 : 0.918
Unit Cell V:
385.48 ų
Z:
1

Type Occurrence of ParafransoletiteHide

Synonyms of ParafransoletiteHide

Other Language Names for ParafransoletiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Montgomeryite1 photo of Parafransoletite associated with Montgomeryite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CA.DavidlloyditeZn3(AsO4)2·4H2O Tric. 1 : P1
8.CA.ApexiteNaMg(PO4)·9H2OTric. 1 : P1
8.CA.05FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OMon.
8.CA.10EhrleiteCa4Be3Zn2(PO4)6 · 9H2OTric. 1 : P1
8.CA.15FaheyiteBe2Mn2+Fe3+2(PO4)4 · 6H2OTrig. 3 2 : P31 2 1
8.CA.20GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
8.CA.20MccrillisiteNaCs(Be,Li)Zr2(PO4)4 · 1-2H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.CA.20SelwyniteNaK(Be,Al)Zr2(PO4)4 · 2H2OTet.
8.CA.25PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
8.CA.30HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.30ArsenohopeiteZn3(AsO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.35WarikahniteZn3(AsO4)2 · 2H2OTric.
8.CA.40PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b
8.CA.45ParascholziteCaZn2(PO4)2 · 2H2OMon.
8.CA.45ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
8.CA.50KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m
8.CA.55PushcharovskiteK0.6Cu18(AsO4)(HAsO4)10(H2AsO4)4(OH)9.6·18.6H2OTric.
8.CA.60ProsperiteCa2Zn4(AsO4)4 · H2OMon.
8.CA.65GengenbachiteKFe3+3(HPO4)4(H2PO4)2 · 6H2OTrig. 3m : P3 1c
8.CA.70ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1

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 ParafransoletiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Dunn, A.R., Foord, E.E. (1992): Parafransoletite, a new dimorph of fransoletite from the Tip Top Pegmatite, Custer, South Dakota. The American Mineralogist, 77, 843-847.

Internet Links for ParafransoletiteHide

Localities for ParafransoletiteHide

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.
USA (TL)
 
  • South Dakota
    • Custer Co.
      • Custer District
        • Fourmile
Kampf, A.R., Dunn, A.R., Foord, E.E. (1992): Parafransoletite, a new dimorph of fransoletite from the Tip Top Pegmatite, Custer, South Dakota. The American Mineralogist, 77, 843-847.
Mineral and/or Locality  
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