Samuelsonite
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About Samuelsonite
Formula:
(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2
Colour:
Pale yellow
Lustre:
Adamantine, Sub-Adamantine
Hardness:
5
Crystal System:
Monoclinic
Name:
Named in 1975 by Paul B. Moore, Anthony J. Irving, and Anthony R. Kampf in honor of Peter B. Samuelson [1941 - ], prospector of Rumney, USA and one-time miner at the Palermo #1 Quarry, the type location.
This page provides mineralogical data about Samuelsonite.
Classification of Samuelsonite
Approved
First published:
1975
7/B.20-30
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
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
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : (AB)3(XO4)2Zq
19.12.65
19 : Phosphates
12 : Phosphates of Mn
19 : Phosphates
12 : Phosphates of Mn
Physical Properties of Samuelsonite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak
Chemical Properties of Samuelsonite
Formula:
(Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2
IMA Formula:
Ca9Mn2+4Al2(PO4)10(OH)2
Chemical Analysis
Oxide wt%:
1 | |
---|---|
P2O5 | 42,76 % |
Al2O3 | 6,37 % |
Fe2O3 | 1,48 % |
FeO | 7,26 % |
MnO | 8,81 % |
CaO | 26,96 % |
Na2O | 0,44 % |
K2O | 0,07 % |
Li2O | 0,42 % |
H2O+ | 1,88 % |
H2O- | 0,03 % |
Insol | 0,28 % |
Total: | 91 % |
Sample references:
ID | Locality | Reference | Notes |
---|---|---|---|
1 | Buranga pegmatite, Gatumba, Ngororero, Western Province, Rwanda | Fransolet, A.-M., von Knorring, O., and Fontan, F. (1992) A new occurrence of samuelsonite in the Buranga pegmatite, Rwanda. Bulletin of the Geological Society of Finland: 64(1): 13-21. |
Crystallography of Samuelsonite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 18.495 Å, b = 6.81 Å, c = 14 Å
β = 112.75°
β = 112.75°
Ratio:
a:b:c = 2.716 : 1 : 2.056
Unit Cell V:
1,626.13 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0000561 | Samuelsonite | Moore P B, Araki T (1977) Samuelsonite: its crystal structure and relation to apatite and octacalcium phosphate American Mineralogist 62 229-245 | ![]() | 1977 | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Samuelsonite
Reference:
Moore, P.B., Irving, A.J., 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.
Synonyms of Samuelsonite
Other Language Names for Samuelsonite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Samuelsonite associated with Palermoite | (Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4 |
Related Minerals - Nickel-Strunz Grouping
8.BF.05 | Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. |
8.BF.05 | Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 | Mon. 2/m : B2/b |
8.BF.05 | Arrojadite-(BaFe) | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. |
8.BF.05 | Arrojadite-(SrFe) | (Sr◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
8.BF.05 | Arrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
8.BF.05 | Arrojadite-(PbFe) | (Pb◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. m : Bb |
8.BF.05 | Fluorarrojadite-(BaFe) | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | Mon. m : Bb |
8.BF.05 | Arrojadite-(NaFe) | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | |
8.BF.05 | Arrojadite-(BaNa) | (Ba◻)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. 2/m : B2/b |
8.BF.05 | Fluorarrojadite-(KNa) | (KNa)(NaNa)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
8.BF.05 | Fluorarrojadite-(NaFe) | (NaNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)F2 | |
8.BF.15 | Griphite | Na4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8 | Iso. m3 (2/m 3) : Pa3 |
8.BF.20 | Nabiasite | BaMn9(VO4)6(OH)2 | Iso. m3 (2/m 3) : Pa3 |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.12.1 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O | Mon. 2/m : P2/b |
19.12.2 | Bermanite | Mn2+Mn3+2(PO4)2(OH)2 · 4H2O | Mon. 2/m : P2/b |
19.12.3 | Natrophilite | NaMn2+PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.4 | Sidorenkite | Na3Mn2+(CO3)(PO4) | Mon. |
19.12.5 | Niahite | (NH4)(Mn2+,Mg)(PO4) · H2O | Orth. mm2 : Pmn21 |
19.12.6 | Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. m : Bb |
19.12.7 | Pararobertsite | Ca2Mn3+3(PO4)3O2 · 3H2O | Mon. 2/m : P21/b |
19.12.8 | Sinkankasite | Mn2+Al(PO3OH)2(OH) · 6H2O | Tric. |
19.12.9 | Mangangordonite | Mn2+Al2(PO4)2(OH)2 · 8H2O | Tric. |
19.12.10 | Heterosite | (Fe3+,Mn3+)PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.11 | Purpurite | Mn3+(PO4) | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.12 | Wolfeite | Fe2+2(PO4)(OH) | Mon. 2/m : P21/b |
19.12.13 | Triploidite | Mn2+2(PO4)(OH) | Mon. 2/m : P2/b |
19.12.14 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 | Tet. |
19.12.15 | Frondelite | Mn2+Fe3+4(PO4)3(OH)5 | Orth. 2 2 2 : C2 2 21 |
19.12.16 | Rockbridgeite | Fe2+Fe3+4(PO4)3(OH)5 | Orth. mmm (2/m 2/m 2/m) |
19.12.17 | Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 | Orth. |
19.12.18 | Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O | Orth. |
19.12.19 | Phosphoferrite | (Fe2+,Mn2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.20 | Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.21 | Earlshannonite | Mn2+Fe3+2(PO4)2(OH)2 · 4H2O | Mon. |
19.12.22 | Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O | Mon. 2/m : B2/b |
19.12.23 | Switzerite | Mn2+3(PO4)2 · 7H2O | Mon. |
19.12.24 | Laueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : P1 |
19.12.25 | Pseudolaueite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.26 | Strunzite | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O | Tric. 1 : P1 |
19.12.27 | Stewartite | Mn2+Fe3+2(PO4)2(OH)2 · 8H2O | Tric. 1 : P1 |
19.12.28 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 | Mon. |
19.12.29 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 | Mon. 2/m : B2/b |
19.12.30 | Fillowite | Na3CaMn2+11(PO4)9 | Trig. 3 : R3 |
19.12.31 | Johnsomervilleite | Na3CaFe11(PO4)9 | Trig. |
19.12.32 | Wicksite | NaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O | Orth. mmm (2/m 2/m 2/m) |
19.12.33 | Dickinsonite-(KMnNa) | (KNa)(Mn2+◻)Ca(Na2Na)Mn2+13Al(PO4)11(PO4)(OH)2 | Mon. 2/m : B2/b |
19.12.34 | Sarcopside | (Fe2+,Mn2+,Mg)3(PO4)2 | Mon. 2/m : P21/b |
19.12.35 | Ludlamite | Fe2+3(PO4)2 · 4H2O | Mon. 2/m : P21/b |
19.12.36 | Graftonite | Fe2+Fe2+2(PO4)2 | Mon. 2/m : P21/b |
19.12.37 | Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O | Orth. |
19.12.38 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O | Tric. 1 : P1 |
19.12.39 | Beusite | Mn2+Mn2+2 (PO4)2 | Mon. |
19.12.40 | Messelite | Ca2Fe2+(PO4)2 · 2H2O | Tric. 1 : P1 |
19.12.41 | Jahnsite-(CaMnFe) | {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.42 | Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.43 | Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P2/b |
19.12.44 | Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O | Mon. 2/m : P2/b |
19.12.45 | Stanfieldite | Ca4Mg5(PO4)6 | Mon. |
19.12.46 | Laubmannite | ||
19.12.47 | Zodacite | Ca4Mn2+Fe3+4(PO4)6(OH)4 · 12H2O | Mon. |
19.12.48 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 | Mon. 2/m : B2/b |
19.12.49 | Maghagendorfite | (Na,◻)MgMn2+(Fe2+,Fe3+)2(PO4)3 | Mon. |
19.12.50 | Varulite | NaCaMn2+Mn2+2(PO4)3 | Mon. 2/m : B2/b |
19.12.51 | Griphite | Na4Li2Ca6(Mn2+,Fe2+,Mg)19Al8(PO4)24(F,OH)8 | Iso. m3 (2/m 3) : Pa3 |
19.12.52 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 | Mon. 2/m : B2/m |
19.12.53 | Arrojadite-(KFe) | (KNa)(Fe2+◻)Ca(Na2◻)Fe2+13Al(PO4)11(PO3OH)(OH)2 | Mon. |
19.12.54 | Lun'okite | (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
19.12.55 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O | Orth. mmm (2/m 2/m 2/m) : Cmca |
19.12.56 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O | Mon. |
19.12.57 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O | Orth. mm2 : Ccc2 |
19.12.58 | Bobfergusonite | Na2Mn5FeAl(PO4)6 | Mon. 2/m : P2/b |
19.12.59 | Qingheiite | NaMn3+Mg(Al,Fe3+)(PO4)3 | Mon. 2/m : P21/b |
19.12.60 | Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.61 | Whiteite-(CaMnMg) | {Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m |
19.12.62 | Whiteite-(MnFeMg) | {(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O | Mon. 2/m : P21/b |
19.12.63 | Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O | Mon. |
19.12.64 | Zanazziite | Ca2Mg5Be4(PO4)6(OH)4 · 6H2O | Mon. 2/m : B2/b |
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Moore, P.B., Irving, A.J., 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.
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(1): 13-21.
Internet Links for Samuelsonite
mindat.org URL:
https://www.mindat.org/min-3517.html
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Localities for Samuelsonite
Locality List




All localities listed without proper references should be considered as questionable.
Czech Republic | |
| 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 | |
| von Knorring, O. (1972) Notes on phosphate minerals from Buranga pegmatite. 16th annual Report Res. Inst. afr. Geol., Univ. Leeds: 56-57.; von Knorring, O. (1973) Notes on pegmatite minerals from Rwanda, Uganda and South West Africa. 17th annual Report Res. Inst. afr. Geol., Univ. Leeds, 72-73.; Fransolet, A.-M., von Knorring, O., and Fontan, F. (1992) A new occurrence of samuelsonite in the Buranga pegmatite, Rwanda. Bulletin of the Geological Society of Finland: 64(1): 13-21.; Daltry, V.D.C. and von Knorring, O. (1998) Type-mineralogy of Rwanda with particular reference to the Buranga pegmatite. Geologica Belgica: 1: 9-15.; Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV.; |
Spain | |
| Roda, E., Fontán, F., Pesquera, A., & Keller, P. (2001). Phosphate mineral associations of the Aldehuela de la Bóveda, Li-Sn-Nb+-Tb bearing pegmatite, Salamanca, Spain: . In Mineral Deposits at the Beginning of the 21 st Century. Proceedings of the Joint sixth Biennial SGA-SEG Meeting (pp. 477-480). |
USA (TL) | |
| Moore, P.B., Irving, A.J., 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. |
Palermo No. 1 Mine, Groton, Grafton Co., New Hampshire, USA