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[Fe3+(H2O)2(PO3OH)]2(SO4) · 1–2H2O
Named for the type locality.
Structurally related to taranakite and synthetic NASICON-type compounds.

Classification of Camaronesite

Approval Year:

Type Occurrence of Camaronesite

General Appearance of Type Material:
crystals up to several mm across form dense intergrowths. More rarely crystals occur as drusy aggregates of tablets up to 0.5 mm in diameter and 0.02 mm thick
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA under catalogue numbers 64023, 64024, 64025, 64026 and 64027. Specimens 64023–64026 are from the first boulder found. Specimen 64027 is from the sec
Geological Setting of Type Material:
a low-temperature, secondary mineral occurring in a sulfate assemblage

Physical Properties of Camaronesite

Diaphaneity (Transparency):
The pale lavender colour of camaronesite is a direct result of the placement of Fe3+ in the crystal structure and, in particular, the isolation of each Fe3+ octahedron from other Fe3+ octahedra by intervening sulfate or phosphate tetrahedra such that no two Fe3+ octahedra share a common face, edge or vertex
Hardness (Mohs):
Irregular/Uneven, Conchoidal, Step-Like
2.43(1) g/cm3 (Measured)    2.383 g/cm3 (Calculated)
crystals generally contain inclusions of anhydrite, this value is probably too high

Crystallography of Camaronesite

Crystal System:
Class (H-M):
3 2 - Trapezohedral
Space Group:
R3 2
Cell Parameters:
a = 9.0833(5) Å, c = 42.944(3) Å
a:c = 1 : 4.728
Unit Cell Volume:
V 3068.5 ų
X-Ray Powder Diffraction Data:
7.74 (45)
7.415 (100)
4.545 (72)
4.426 (26)
3.862 (32)
3.298 (93)
3.179 (25)
2.818 (25)

Optical Data of Camaronesite

Uniaxial (+)
RI values:
nω = 1.612() nε = 1.621(1)
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
O (pale lavender) > E (colourless).

Chemical Properties of Camaronesite

[Fe3+(H2O)2(PO3OH)]2(SO4) · 1–2H2O
All elements listed in formula:

Other Names for Camaronesite

Name in Other Languages:

Other Information

Other Information:
A small crystal of camaronesite requires several hours to dissolve in cold, concentrated HCl and several days to dissolve in concentrated H2SO4.
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 Camaronesite

Reference List:
Kampf, A. R., Mills, S. J., Nash, B. P., Housley, R. M., Rossman, G. R., Dini, M. and Gatta G.D. (2013): Camaronesite, [Fe3+(H2O)2(PO3OH)]2(SO4)•1–2H2O, a new phosphate-sulfate from the Camarones Valley, Chile, structurally related to taranakite. Mineral. Mag. 77, 453-465.

Internet Links for Camaronesite URL:
Please feel free to link to this page.

Localities for Camaronesite

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.
Chile (TL)
  • Arica and Parinacota Region
    • Arica Province
      • Los Camarones
        • Cuya
Kampf, A. R., Mills, S. J., Nash, B. P., Housley, R. M., Rossman, G. R., Dini, M. and Gatta G.D. (2013): Camaronesite, [Fe3+(H2O)2(PO3OH)]2(SO4)•1–2H2O, a new phosphate-sulfate from the Camarones Valley, Chile, structurally related to taranakite. Mineralogical Magazine 77, 453-465.
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