Sanjuanite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Sanjuanite
Formula:
Al2(PO4)(SO4)(OH) · 9H2O
Colour:
White
Lustre:
Silky, Dull
Hardness:
3
Specific Gravity:
1.94
Crystal System:
Triclinic
Member of:
Name:
Named after the Province of San Juan, Argentina, the discovery locality.
Unique Identifiers
Mindat ID:
3522
Long-form identifier:
mindat:1:1:3522:0
GUID
(UUID V4):
(UUID V4):
b0d12680-551e-4207-81a2-11ad3860caa6
IMA Classification of Sanjuanite
Approved
Approval year:
1966
First published:
1968
Classification of Sanjuanite
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
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
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
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Sjn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sanjuanite
Silky, Dull
Transparency:
Transparent
Colour:
White
Hardness:
3 on Mohs scale
Fracture:
Irregular/Uneven
Density:
1.94 g/cm3 (Measured) 1.96 g/cm3 (Calculated)
Optical Data of Sanjuanite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v to r < v strong
Chemistry of Sanjuanite
Mindat Formula:
Al2(PO4)(SO4)(OH) · 9H2O
Crystallography of Sanjuanite
Crystal System:
Triclinic
Cell Parameters:
a = 11.314(11) Å, b = 9.018(9) Å, c = 7.376(7) Å
α = 93°, β = 95°, γ = 105°
α = 93°, β = 95°, γ = 105°
Ratio:
a:b:c = 1.255 : 1 : 0.818
Unit Cell V:
721.96 ų (Calculated from Unit Cell)
Comment:
Questionable
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
---|---|---|---|---|---|---|---|
0018459 | Sanjuanite | Colombo F, Rius J, Pannunzio-Miner E V, Pedregosa J C, Cami G E, Carbonio R E (2011) Sanjuanite: Ab Initio crystal-structure solution from laboratory powder-diffraction data, complemented by FTIR spectroscopy and DT-TG analyses Pocito Department, San Juan Province, Argentina The Canadian Mineralogist 49 835-847 | 2011 | Pensylvanian slates belonging to Los Jejenes Formation at the | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.77 Å | (100) |
4.13 Å | (55) |
5.28 Å | (38) |
4.32 Å | (36) |
3.450 Å | (35) |
8.66 Å | (30) |
4.27 Å | (30) |
Comments:
Sierra Chica de Zonda, Argentina. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47b : [Sulfates and sulfites] | |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Sanjuanite
General Appearance of Type Material:
Microscopic laths, parallel to divergent, fibrous, in chalk-like aggregates.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 149522.
Geological Setting of Type Material:
Dark Carboniferous slate.
Associated Minerals at Type Locality:
Reference:
de Abeledo, M.E.J., Angelelli, V., de Benyacar, M.A.R., Gordillo, C. (1968) Sanjuanite, a new hydrated basic sulfate-phosphate of aluminum. American Mineralogist: 53: 1-8.
Synonyms of Sanjuanite
Other Language Names for Sanjuanite
German:Sanjuanit
Spanish:Sanjuanita
Relationship of Sanjuanite to other Species
Member of:
Other Members of this group:
Destinezite | Fe3+2(PO4)(SO4)(OH) · 6H2O | Tric. 1 : P1 |
Sarmientite | Fe3+2(AsO4)(SO4)(OH) · 5H2O | Mon. 2/m : P21/b |
Zýkaite | Fe3+4(AsO4)3(SO4)(OH) · 15H2O | Orth. 2 2 2 : P2 2 2 |
Related Minerals - Strunz-mindat Grouping
8.DB. | Arangasite | Al2F(PO4)(SO4) · 9H2O |
8.DB. | Camaronesite | [Fe3+(H2O)2(PO3OH)]2(SO4) · 1-2H2O |
8.DB. | Höslite | Fe3+3(VO4)2(SO4)(OH)(H2O)4 · 3H2O |
8.DB.05 | Diadochite | Fe3+2(PO4)(SO4)(OH) · 6H2O |
8.DB.05 | Pitticite | (Fe, AsO4, H2O) (?) |
8.DB.05 | Destinezite | Fe3+2(PO4)(SO4)(OH) · 6H2O |
8.DB.07 | Wilhelmgümbelite | ZnFe2+Fe3+3(PO4)3(OH)4(H2O)5 · 2H2O |
8.DB.07 | Schmidite | [Zn2(Fe3+,Mn2+)2Fe3+(PO4)3(OH)3(H2O)6] · 2H2O |
8.DB.07 | Wildenauerite | Zn(Fe3+,Mn2+)2MnFe3+(PO4)3(OH)3(H2O)6 · 2H2O |
8.DB.10 | Vashegyite | Al11(PO4)9(OH)6 · 38H2O |
8.DB.15 | Schoonerite | ZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2O |
8.DB.20 | Sinkankasite | Mn2+Al(PO3OH)2(OH) · 6H2O |
8.DB.25 | Mitryaevaite | Al6(PO4)((P,S)O3(OH,O))2F2(OH)2 · 14.5H2O |
8.DB.35 | Sarmientite | Fe3+2(AsO4)(SO4)(OH) · 5H2O |
8.DB.40 | Bukovskýite | Fe3+2(AsO4)(SO4)(OH) · 9H2O |
8.DB.40 | Flurlite | Zn3Mn2+Fe3+(PO4)3(OH)2 · 9H2O |
8.DB.40 | Manganflurlite | ZnMn2+3Fe3+(PO4)3(OH)2(H2O)7 · 2H2O |
8.DB.42 | Bohuslavite | Fe3+4(PO4)3(SO4)(OH) · nH2O |
8.DB.45 | Zýkaite | Fe3+4(AsO4)3(SO4)(OH) · 15H2O |
8.DB.47 | Lapeyreite | Cu3O[AsO3(OH)]2 · 0.75H2O |
8.DB.50 | Giniite | Fe2+Fe3+4(PO4)3(OH)5 · 2H2O |
8.DB.50 | Rossiantonite | Al3(PO4)(SO4)2(OH)2(H2O)14 |
8.DB.52 | Arctowskite | Al9(PO4)8(OH)3 · 27H2O |
8.DB.55 | Sasaite | (Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O |
8.DB.60 | Mcauslanite | Fe3Al2(PO4)3(PO3OH)F · 18H2O |
8.DB.65 | Goldquarryite | CuCd2Al3(PO4)4F2(H2O,F)2 · 10H2O |
8.DB.70 | Birchite | Cd2Cu2(PO4)2(SO4) · 5H2O |
8.DB.75 | Braithwaiteite | NaCu5(Ti4+Sb5+)(AsO4)4(HAsO4)2O2 · 8H2O |
Other Information
Thermal Behaviour:
Heated in a closed tube, it gives of a high proportion of acid water.
Notes:
Readily soluble in warm mineral acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Sanjuanite
mindat.org URL:
https://www.mindat.org/min-3522.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Sanjuanite
Reference List:
de Abeledo, M. E. J., Angelelli, V., de Benyacar, M. A. R., Gordillo, C. (1968) Sanjuanite, a new hydrated basic sulfate-phosphate of aluminum. American Mineralogist, 53 (1-2) 1-8
De Bruiyn, H., Beukes, G. J., Van Der Westhuizen, W. A., Tordiffe, E. A. W. (1989) Unit cell dimensions of the hydrated aluminium phosphate–sulphate minerals sanjuanite, kribergite, and hotsonite. Mineralogical Magazine, 53 (371) 385-386 doi:10.1180/minmag.1989.053.371.17
Colombo, F., Rius, J., Pannunzio-Miner, E. V., Pedregosa, J. C., Cami, G. E., Carbonio, R. E. (2011) Sanjuanite: Ab Initio crystal-structure solution from laboratory powder-diffraction data, complemented by FTIR spectroscopy and DT-TG analyses. The Canadian Mineralogist, 49 (3) 835-847 doi:10.3749/canmin.49.3.835
Localities for Sanjuanite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Argentina (TL) | |
| |
Poland | |
| |
Venezuela | |
| |
| 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 (10) 1906-1913 doi:10.2138/am.2013.4393 |
Quick NavTopAbout SanjuaniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsStrunz-MindatOther InformationInternet Links References Localities Locality List
Sierra Chica de Zonda, Pocito Department, San Juan Province, Argentina