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Samuelsonite

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Peter B.Samuelson 2001
Formula:
(Ca,Ba)Ca8Fe22+Mn22+Al2(PO4)10(OH)2
System:
Monoclinic
Colour:
Pale yellow
Hardness:
5
Name:
Named after Peter B. Samuelson, prospector of Rumney, USA.
This page provides mineralogical data about Samuelsonite.

Classification of Samuelsonite

Approved
8.BF.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
F : With medium-sized and large cations, (OH, etc.):RO4< 0.5:1
41.10.8.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq
19.12.65

19 : Phosphates
12 : Phosphates of Mn
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First Recorded Occurrence of Samuelsonite

Physical Properties of Samuelsonite

Adamantine, Sub-Adamantine
Colour:
Pale yellow
Hardness (Mohs):
5

Crystallography of Samuelsonite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 18.495Å, b = 6.81Å, c = 14Å
β = 112.75°
Ratio:
a:b:c = 2.716 : 1 : 2.056
Unit Cell Volume:
V 1,626.13 ų (Calculated from Unit Cell)
Z:
2

Optical Data of Samuelsonite

Type:
Biaxial (+)
RI values:
nα = 1.645 - 1.648 nβ = 1.650 - 1.655 nγ = 1.655 - 1.667
2V:
Measured: 70° to 85°, Calculated: 75°
Max Birefringence:
δ = 0.010 - 0.019
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak

Chemical Properties of Samuelsonite

Formula:
(Ca,Ba)Ca8Fe22+Mn22+Al2(PO4)10(OH)2
Essential elements:
All elements listed in formula:

Relationship of Samuelsonite to other Species

8.BF.05Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn132+}{Al}(PO4)12(OH)2
8.BF.05Arrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(SrFe){Sr◻}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(KNa){KNa}{Na2}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(PbFe){Pb◻}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Fluorarrojadite-(BaFe){Ba◻}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)F2
8.BF.05Arrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Arrojadite-(BaNa){Ba◻}{Na2}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
8.BF.05Fluorarrojadite-(KNa){KNa}{Na2}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)F2
8.BF.05Fluorarrojadite-(NaFe){Na2}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)F2
8.BF.15GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8
8.BF.20NabiasiteBaMn92+(VO4,AsO4)6(OH)2
19.12.1MetaswitzeriteMn3(PO4)2 · 4H2O
19.12.2BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
19.12.3NatrophiliteNaMn2+PO4
19.12.4SidorenkiteNa3Mn2+(CO3)(PO4)
19.12.5Niahite(NH4)(Mn2+,Mg)(PO4) · H2O
19.12.6RobertsiteCa3Mn43+(PO4)3O2 · 3H2O
19.12.7PararobertsiteCa2Mn33+(PO4)3O2 · 3H2O
19.12.8SinkankasiteMn2+Al(PO3OH)2(OH) · 6H2O
19.12.9MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2O
19.12.10Heterosite(Fe3+,Mn3+)PO4
19.12.11Purpurite(Mn3+,Fe3+)PO4
19.12.12Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
19.12.13Triploidite(Mn2+,Fe2+)2(PO4)(OH)
19.12.14LipscombiteFe2+Fe23+(PO4)2(OH)2
19.12.15FrondeliteMn2+Fe43+(PO4)3(OH)5
19.12.16RockbridgeiteFe2+Fe43+(PO4)3(OH)5
19.12.17Kryzhanovskite(Fe3+,Mn2+)3(PO4)2(OH,H2O)3
19.12.18LandesiteMn2+3-xFex3+(PO4)2(OH)x · (3-x)H2O
19.12.19Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2O
19.12.20Reddingite(Mn2+,Fe2+)3(PO4)2 · 3H2O
19.12.21EarlshannoniteMn2+Fe23+(PO4)2(OH)2 · 4H2O
19.12.22Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
19.12.23Switzerite(Mn,Fe)3(PO4)2 · 7H2O
19.12.24LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.25PseudolaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.26StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
19.12.27StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
19.12.28Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
19.12.29Ferroalluaudite(Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3
19.12.30Fillowite{Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36
19.12.31JohnsomervilleiteNa10Ca6Mg18Fe25(PO4)36
19.12.32WicksiteNaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O
19.12.33Dickinsonite-(KMnNa){KNa}{Mn2+◻}{Ca}{Na3}{Mn132+}{Al}(PO4)12(OH)2
19.12.34Sarcopside(Fe2+,Mn2+,Mg)3(PO4)2
19.12.35Ludlamite(Fe,Mn,Mg)3(PO4)2 · 4H2O
19.12.36Graftonite(Fe2+,Mn2+,Ca)3(PO4)2
19.12.37WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2O
19.12.38FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
19.12.39Beusite(Mn2+,Fe2+,Ca,Mg)3(PO4)2
19.12.40MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
19.12.41Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.42Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn22+}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.43Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
19.12.44KeckiteCaMn2+Fe23+Fe23+(PO4)4(OH)3(H2O)7
19.12.45StanfielditeCa7Ca2Mg9(PO4)12
19.12.46Laubmannite(Fe2+,Mn2+,Ca)3Fe63+(PO4)4(OH)12
19.12.47ZodaciteCa4Mn2+Fe43+(PO4)6(OH)4 · 12H2O
19.12.48HagendorfiteNaCaMn2+Fe22+(PO4)3
19.12.49Maghagendorfite(□,Na,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(PO4)3
19.12.50VaruliteNaCaMn2+Mn22+(PO4)3
19.12.51GriphiteNa4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8
19.12.52Attakolite(Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4
19.12.53Arrojadite-(KFe){KNa}{Fe2+◻}{Ca}{Na2◻}{Fe132+}{Al}(PO4)11(HPO4)(OH)2
19.12.54Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O
19.12.55Eosphorite(Mn2+,Fe2+)Al(PO4)(OH)2 · H2O
19.12.56Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O
19.12.57Childrenite(Fe2+,Mn2+)Al(PO4)(OH)2 · H2O
19.12.58BobfergusoniteNa2Mn5FeAl(PO4)6
19.12.59QingheiiteNaMn3+Mg(Al,Fe3+)(PO4)3
19.12.60Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.61Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.62Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O
19.12.63Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O
19.12.64ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O

Other Names for Samuelsonite

Name in Other Languages:

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 Samuelsonite

Reference List:
Moore, P. B., Irving, A. J. and Kampf, A. R. (1975): Foggite, CaAl(OH)2(H2O)[PO4]; goedkenite, (Sr,Ca)2Al(OH)[PO4]2; and samuelsonite, (Ca,Ba)Fe22+Mn22+Ca8Al2(OH)2[PO4]10. Three new species from the Palermo No. 1 pegmatite, North Groton, New Hampshire. American Mineralogist: 60: 957-964.

Moore, P.B. & Araki, T.(1977): Samuelsonite: its crystal structure and relation to apatite and octacalcium phosphate. American Mineralogist: 62: 229-245.

Internet Links for Samuelsonite

Localities for Samuelsonite

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
 
  • Bohemia (Böhmen; Boehmen)
    • Plzeň Region
      • Poběžovice (Ronsperg; Ronsberg; Ronsperk)
        • Otov
Masau, M., Staněk, J., Černý, P., Chapman, R. (2000). Metasomatic wolfeite and associated phosphates from the Otov I granitic pegmatite, western Bohemia. J. Czech Geol. Soc. 45, 159-173.
Rwanda
 
  • Western Province
    • Gatumba District
Fransolet, A.M., von Knorring, O. & Fontan, F. (1992): A new occurrence of samuelsonite in the Buranga Pegmatite, Rwanda. Bulletin of the Geological Society of Finland 64, 13-21 ; Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
USA
 
  • New Hampshire
    • Grafton Co.
      • Groton
Amer.Min.(1975) 60, 957-964
Mineral and/or Locality  
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