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Sanjuanite

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About SanjuaniteHide

Formula:
Al2(PO4)(SO4)(OH) · 9H2O
Colour:
White
Lustre:
Silky, Dull
Hardness:
3
Name:
Named after its discovery locality.

Classification of SanjuaniteHide

Approved
Approval Year:
1966
8.DB.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
43.5.1.3

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
22.3.11

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates

Physical Properties of SanjuaniteHide

Silky, Dull
Colour:
White
Hardness:

Optical Data of SanjuaniteHide

Type:
Biaxial
RI values:
nα = 1.484 nγ = 1.499
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v to r < v strong

Chemical Properties of SanjuaniteHide

Formula:
Al2(PO4)(SO4)(OH) · 9H2O

Type Occurrence of SanjuaniteHide

Synonyms of SanjuaniteHide

Other Language Names for SanjuaniteHide

German:Sanjuanit
Spanish:Sanjuanita

Relationship of Sanjuanite to other SpeciesHide

Other Members of this group:
DestineziteFe3+2(PO4)(SO4)(OH) · 6H2OTric. 1 : P1
SarmientiteFe3+2(AsO4)(SO4)(OH) · 5H2OMon. 2/m : P21/b
ZýkaiteFe3+4(AsO4)3(SO4)(OH) · 15H2OOrth.

Related Minerals - Nickel-Strunz GroupingHide

8.DB.05DiadochiteFe3+2(PO4)(SO4)(OH) · 5H2OAmor.
8.DB.05Pitticite(Fe, SO4, AsO4, H2O) ?Amor.
8.DB.05DestineziteFe3+2(PO4)(SO4)(OH) · 6H2OTric. 1 : P1
8.DB.10VashegyiteAl11(PO4)9(OH)6 · 38H2OOrth. mmm (2/m 2/m 2/m)
8.DB.15SchooneriteZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2OOrth. mmm (2/m 2/m 2/m) : Pbam
8.DB.20SinkankasiteMn2+Al(PO3OH)2(OH) · 6H2OTric.
8.DB.25MitryaevaiteAl6(PO4)((P,S)O3(OH,O))2F2(OH)2 · 14.5H2OTric.
8.DB.35SarmientiteFe3+2(AsO4)(SO4)(OH) · 5H2OMon. 2/m : P21/b
8.DB.40BukovskýiteFe3+2(AsO4)(SO4)(OH) · 9H2OTric. 1 : P1
8.DB.45ZýkaiteFe3+4(AsO4)3(SO4)(OH) · 15H2OOrth.
8.DB.50GiniiteFe2+Fe3+4(PO4)3(OH)5 · 2H2OMon. 2/m : P2/b
8.DB.55Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2OOrth.
8.DB.60McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2OTric.
8.DB.65GoldquarryiteCuCd2Al3(PO4)4F2(H2O,F)2 · 10H2OTric. 1 : P1
8.DB.70BirchiteCd2Cu2(PO4)2(SO4) · 5H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.DB.75BraithwaiteiteNaCu5(Ti4+Sb5+)(AsO4)4(HAsO4)2O2 · 8H2OTric. 1 : P1

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

43.5.1.1SarmientiteFe3+2(AsO4)(SO4)(OH) · 5H2OMon. 2/m : P21/b
43.5.1.2BukovskýiteFe3+2(AsO4)(SO4)(OH) · 9H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

22.3.1ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2OOrth. mm2 : Pmn21
22.3.2ArdealiteCa2(HPO4)(SO4) · 4H2OMon. m : Bb
22.3.3Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2OHex.
22.3.4ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2OMon.
22.3.5PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2OTric. 1 : P1
22.3.6ChalcophylliteCu18Al2(AsO4)4(SO4)3(OH)24 · 36H2OTrig. 3 : R3
22.3.7WoodhouseiteCaAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.8Schlossmacherite(H3O)Al3(SO4)2(OH)6Trig.
22.3.9SvanbergiteSrAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.10KemmlitziteSrAl3(AsO4)(SO4)(OH)6Trig.
22.3.12KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
22.3.13HotsoniteAl11(SO4)3(PO4)2(OH)21 · 16H2OTric.
22.3.14WeileriteBaAl3(AsO4)(SO4)(OH)6
22.3.15TsumebitePb2Cu(PO4)(SO4)(OH)Mon. 2/m : P21/m
22.3.16ArsentsumebitePb2Cu(AsO4)(SO4)(OH)Mon. 2/m : P21/m
22.3.17HinsdalitePbAl3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.18HidalgoitePbAl3(AsO4)(SO4)(OH)6Trig.
22.3.19OrpheitePbAl3(PO4)(SO4)(OH)6Trig.
22.3.20CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
22.3.21Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2OOrth.
22.3.22Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2OHex.
22.3.23CorkitePbFe3(PO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.24BeudantitePbFe3(AsO4)(SO4)(OH)6Trig. 3m (3 2/m) : R3m
22.3.25DiadochiteFe3+2(PO4)(SO4)(OH) · 5H2OAmor.
22.3.26SarmientiteFe3+2(AsO4)(SO4)(OH) · 5H2OMon. 2/m : P21/b
22.3.27BukovskýiteFe3+2(AsO4)(SO4)(OH) · 9H2OTric. 1 : P1
22.3.28ZýkaiteFe3+4(AsO4)3(SO4)(OH) · 15H2OOrth.
22.3.29TooeleiteFe3+6(As3+O3)4(SO4)(OH)4 · 4H2OMon. 2/m : B2/m
22.3.30Pitticite(Fe, SO4, AsO4, H2O) ?Amor.
22.3.31Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.

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 SanjuaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
de Abeledo, M.E.J., V. Angelelli, M.A.R. de Benyacar, and C. Gordillo (1968): Sanjuanite, a new hydrated basic sulfate-phosphate of aluminum. American Mineralogist, 53, 1-8.
de Bruiyn, H., G.J. Beukes, W.A. van der Westhuizen, and E.A.W. Tordiffe (1989): Unit cell dimensions of the hydrated aluminium phosphate-sulphate minerals sanjuanite, kribergite, and hotsonite. Mineralogical Magazine, 53, 385-386.
F. Colombo, J. Rius & E.V. Panunzio (2010): Crystal structure solution of the mineral sanjuanite from laboratory powder diffraction data. 26th European Crystallographic Meeting 29 August- 2 September 2010, Darmstadt, Germany, Abstract, 2010, MS16-P13.

Internet Links for SanjuaniteHide

Localities for SanjuaniteHide

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.
Argentina (TL)
 
  • San Juan
    • Pocito Department
MM 53 (1989), 385; HB4 (2000)
Venezuela
 
  • Bolívar
    • Auyán-tepui (Auyán-tepuy; Ayan Tepui)
Sauro, F., De Vivo, A., Vergara, F., & De Waele, J. (2013). Imawarì Yeuta: a new giant cave system in the quartz sandstones of the Auyan Tepui, Bolivar state, Venezuela. In Proceedings of the 16th International Congress of Speleology (Vol. 2, pp. 19-27).
    • Chimantá Massif (Chimantha Massif)
Galli, E., Brigatti, M.F., Malferrari, D., Sauro, F., De Waele, J. (2013): Rossiantonite, Al3(PO4)(SO4)2(OH)2(H2O)10•4H2O, a new hydrated aluminum phosphate-sulfate mineral from Chimanta massif, Venezuela: Description and crystal structure. American Mineralogist, 98, 1906-1913.
Mineral and/or Locality  
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