Sinkankasite
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About Sinkankasite
Formula:
Mn2+Al(PO3OH)2(OH) · 6H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
4
Crystal System:
Triclinic
Name:
Named in 1984 by Donald R. Peacor, Pete J. Dunn, Willard Lincoln Roberts, Thomas J. Campbell, and William B. Simmons in honor of Captain John Sinkankas [May 15, 1915 Paterson, New Jersey, USA - May 17, 2002 San Diego, California, USA] innovator in faceting gem stones, author of mineralogical and gemological books, rare geoscience book dealer, mineral artist, mineral collector, and associate with Scripps Institute of Oceanography.
This page provides mineralogical data about Sinkankasite.
Classification of Sinkankasite
Approved
Approval Year:
1982
7/D.04-20
8.DB.20
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
42.7.1.4
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
19.12.8
19 : Phosphates
12 : Phosphates of Mn
19 : Phosphates
12 : Phosphates of Mn
Physical Properties of Sinkankasite
Optical Data of Sinkankasite
Type:
Biaxial (-)
RI values:
nα = 1.511 nβ = 1.529 nγ = 1.544
2V:
Measured: 84° , Calculated: 82°
Max Birefringence:
δ = 0.033

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:
Low
Dispersion:
r < v
Chemical Properties of Sinkankasite
Formula:
Mn2+Al(PO3OH)2(OH) · 6H2O
Crystallography of Sinkankasite
Crystal System:
Triclinic
Cell Parameters:
a = 9.59 Å, b = 9.81 Å, c = 6.86 Å
α = 108.04°, β = 99.63°, γ = 98.87°
α = 108.04°, β = 99.63°, γ = 98.87°
Ratio:
a:b:c = 0.978 : 1 : 0.699
Unit Cell V:
590.21 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Image Loading
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Type Occurrence of Sinkankasite
Synonyms of Sinkankasite
Other Language Names for Sinkankasite
Common Associates
Associated Minerals Based on Photo Data:
Hureaulite | 1 photo of Sinkankasite associated with Hureaulite on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
8.DB.05 | Diadochite | Fe3+2(PO4)(SO4)(OH) · 5H2O | Amor. |
8.DB.05 | Pitticite | (Fe, SO4, AsO4, H2O) ? | Amor. |
8.DB.05 | Destinezite | Fe3+2(PO4)(SO4)(OH) · 6H2O | Tric. 1 : P1 |
8.DB.10 | Vashegyite | Al11(PO4)9(OH)6 · 38H2O | Orth. mmm (2/m 2/m 2/m) |
8.DB.15 | Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O | Orth. mmm (2/m 2/m 2/m) : Pbam |
8.DB.25 | Mitryaevaite | Al6(PO4)((P,S)O3(OH,O))2F2(OH)2 · 14.5H2O | Tric. |
8.DB.30 | Sanjuanite | Al2(PO4)(SO4)(OH) · 9H2O | |
8.DB.35 | Sarmientite | Fe3+2(AsO4)(SO4)(OH) · 5H2O | Mon. 2/m : P21/b |
8.DB.40 | Bukovskýite | Fe3+2(AsO4)(SO4)(OH) · 9H2O | Tric. 1 : P1 |
8.DB.45 | Zýkaite | Fe3+4(AsO4)3(SO4)(OH) · 15H2O | Orth. |
8.DB.50 | Giniite | Fe2+Fe3+4(PO4)3(OH)5 · 2H2O | Mon. 2/m : P2/b |
8.DB.55 | Sasaite | (Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O | Orth. |
8.DB.60 | Mcauslanite | Fe3Al2(PO4)3(PO3OH)F · 18H2O | Tric. |
8.DB.65 | Goldquarryite | CuCd2Al3(PO4)4F2(H2O,F)2 · 10H2O | Tric. 1 : P1 |
8.DB.70 | Birchite | Cd2Cu2(PO4)2(SO4) · 5H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
8.DB.75 | Braithwaiteite | NaCu5(Ti4+Sb5+)(AsO4)4(HAsO4)2O2 · 8H2O | Tric. 1 : P1 |
Related Minerals - Dana Grouping (8th Ed.)
42.7.1.1 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O | Orth. mm2 : Ccc2 |
42.7.1.2 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O | Orth. mmm (2/m 2/m 2/m) : Cmca |
42.7.1.3 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O | Mon. |
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 |
19.12.9 | 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+,Fe3+)PO4 | Orth. mmm (2/m 2/m 2/m) : Pmna |
19.12.12 | Wolfeite | (Fe2+,Mn2+)2(PO4)(OH) | Mon. 2/m : P21/b |
19.12.13 | Triploidite | (Mn2+,Fe2+)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 | (Mn,Fe)5(PO4)2(HPO4)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 | |
19.12.30 | Fillowite | {Mn2+}{Na8}{Ca4Na4}{(Mn2+,Fe2+)43}(PO4)36 | Trig. 3 : R3 |
19.12.31 | Johnsomervilleite | Na10Ca6Mg18Fe25(PO4)36 | 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}{Na3}{Mn2+13}{Al}(PO4)12(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 | (Fe2+,Mn2+,Ca)3Fe3+6(PO4)4(OH)12 | |
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,)(Na,Ca,Fe2+)Mn(Mg,Fe2+,Fe3+)3(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) |
19.12.52 | Attakolite | (Ca,Sr)Mn(Al,Fe)4(HPO4,PO4)3(SiO4,PO4)(OH)4 | Mon. 2/m : B2/m |
19.12.53 | Arrojadite-(KFe) | {KNa}{Fe2+◻}{Ca}{Na2◻}{Fe2+13}{Al}(PO4)11(HPO4)(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 |
19.12.65 | Samuelsonite | (Ca,Ba)Ca8Fe2+2Mn2+2Al2(PO4)10(OH)2 | Mon. 2/m : B2/m |
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 Sinkankasite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Peacor, D.R., Dunn, P.J., Roberts, W.L., Campbell, T.J., and Simmons,
W.B. (1984) Sinkankasite, a new phosphate from the Barker pegmatite, South Dakota. American Mineralogist, 69, 380–382.
Burns, P.C. and Hawthorne, F.C. (1995) The crystal structure of sinkankasite, a
complex heteropolyhedral sheet mineral. American Mineralogist, 80, 620–627.
Internet Links for Sinkankasite
mindat.org URL:
https://www.mindat.org/min-3674.html
Please feel free to link to this page.
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External Links:
Mineral Dealers:
Localities for Sinkankasite
Locality List




All localities listed without proper references should be considered as questionable.
Russia | |
| Gamyanin, G.N., Zayakina, N.V., Galenchikova, L.T. (2013): Arangasite, Al2(PO4)(SO4)F·7.5Н2O, a new mineral from Alaskitovoye deposit (Eastern Yakutia, Russia)". Zapiski RMO, 142(5), 21-30. ; Gamyanin, G. N., Zayakina, N. V., & Galenchikova, L. T. (2014). Arangasite, Al2 (PO4)(SO4) F· 7.5 H2O, a new mineral from the Alyaskitovy deposit, Eastern Yakutia, Russia. Geology of Ore Deposits, 56(7), 560-566. |
USA | |
| American Mineralogist (1984): 69: 380-382. |
| Peacor, D.R., Dunn, P.J., Roberts, W.L., Campbell, T.J., and Simmons, W.B. (1984) Sinkankasite, a new phosphate from the Barker pegmatite, South Dakota. American Mineralogist, 69, 380–382. |
Barker-Ferguson Mine, Keystone, Keystone District, Pennington Co., South Dakota, USA