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Fe33+(PO4)2(OH)3 · 5H2O
Orange, orange brown, ...
Named in 2000 by Giovanni Pratesi, Curzio Cipriani, Gabriele Giuli, and William D. Birch for the type locality in the Santa Barbara mining district, Valdarno, Tuscany, Italy. St. Barbara (4th century) is the patron saint of miners.
Consists of x-ray amorphous replacements of vivianite as well as smooth botryoidal crusts.

Classification of Santabarbaraite

Approved 2000

C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5 URL:
Please feel free to link to this page.

Type Occurrence of Santabarbaraite

General Appearance of Type Material:
resinous botryoidal masses and waxy to resinous replacements of vivianite.
Geological Setting of Type Material:
pseudomorphous after vivianite

Physical Properties of Santabarbaraite

Sub-Vitreous, Resinous, Waxy, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Orange, orange brown, yellowish-brown
yellow to yellowish-brown
None Observed
parting according to the vivianite cleavage
2.42 g/cm3 (Measured)    

Crystallography of Santabarbaraite

Crystal System:
Pseudomorphs of vivianite or botryoidal crusts.
X-ray amorphous; Partial replacements said to contain poorly crystalline vivianite, but the analogy to the phosphate analog of parasymplesite are unsupported by data.

Optical Data of Santabarbaraite

RI values:
n = 1.695
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:

Chemical Properties of Santabarbaraite

Fe33+(PO4)2(OH)3 · 5H2O
Essential elements:
All elements listed in formula:

Relationship of Santabarbaraite to other Species

8.CE.05Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
8.CE.05GeigeriteMn52+(AsO4)2(HAsO4)2 · 10H2O
8.CE.10NewberyiteMg(HPO4) · 3H2O
8.CE.15BrassiteMg(HAsO4) · 4H2O
8.CE.20PhosphorrössleriteMg(HPO4) · 7H2O
8.CE.20RössleriteMg(HAsO4) · 7H2O
8.CE.25MetaswitzeriteMn3(PO4)2 · 4H2O
8.CE.25Switzerite(Mn,Fe)3(PO4)2 · 7H2O
8.CE.30LindackeriteCuCu4(AsO4)2(HAsO4)2 · 8-9H2O
8.CE.30OndrušiteCaCu4(AsO4)2(HAsO4)2 · 10H2O
8.CE.30VeselovskýiteZnCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30PradetiteCoCu4(AsO4)2(HAsO4)2 · 9H2O
8.CE.30KlajiteMnCu4(AsO4)2(HAsO4)2 · 9-10H2O
8.CE.35BobierriteMg3(PO4)2 · 8H2O
8.CE.40AnnabergiteNi3(AsO4)2 · 8H2O
8.CE.40ArupiteNi3(PO4)2 · 8H2O
8.CE.40Barićite(Mg,Fe)3(PO4)2 · 8H2O
8.CE.40ErythriteCo3(AsO4)2 · 8H2O
8.CE.40FerrisymplesiteFe33+(AsO4)2(OH)3 · 5H2O
8.CE.40HörnesiteMg3(AsO4)2 · 8H2O
8.CE.40KöttigiteZn3(AsO4)2 · 8H2O
8.CE.40Manganohörnesite(Mn,Mg)3(AsO4)2 · 8H2O
8.CE.40ParasymplesiteFe32+(AsO4)2 · 8H2O
8.CE.40VivianiteFe32+(PO4)2 · 8H2O
8.CE.40PakhomovskyiteCo3(PO4)2 · 8H2O
8.CE.45SymplesiteFe32+(AsO4)2 · 8H2O
8.CE.50CattiiteMg3(PO4)2 · 22H2O
8.CE.55KoninckiteFe3+PO4 · 3H2O
8.CE.60KaňkiteFeAsO4 · 3.5H2O
8.CE.65SteigeriteAl(VO4) · 3H2O
8.CE.70MetaschoderiteAl2(PO4)(VO4) · 6H2O
8.CE.70SchoderiteAl2(PO4)(VO4) · 8H2O
8.CE.75MalhmooditeFeZr(PO4)2 · 4H2O
8.CE.75ZigrasiteMgZr(PO4)2 · 4H2O
8.CE.75Unnamed (Ca-analogue of Zigrasite)CaZr[PO4]2 · 4H2O
8.CE.85Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)

Other Names for Santabarbaraite

Name in Other Languages:
Simplified Chinese:羟水磷铁石
Traditional Chinese:羥水磷鐵石

Other Information

Not fluorescent in UV
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 Santabarbaraite

Reference List:
Pratesi, G., C. Cipriani, G. Giuli. & W. Birch (2003): "Santabarbaraite: a new amorphous phosphate mineral", European Journal of Mineralogy: 15: 185-192.

Internet Links for Santabarbaraite

Localities for Santabarbaraite

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.
  • Victoria
    • Wannon
      • Wannon River
G. Pratesi, C. Cipriani, G. Giuli. & W. Birch (2003): Santabarbaraite: a new amorphous phosphate mineral.- Eur. J. Mineral. 15, 185-192
  • Adamaoua Region
    • Adamaoua Plateau (Adamawa Plateau)
FRANSOLET, A.-M., OUSTRIERE, P., FONTAN, F. & PILLARD, F. (1984) La mantiennéite, une nouvelle espèce minérale du gisement de vivianite d'Anloua, Cameroun. Bulletin de Minéralogie 107, 737-744.
  • Bavaria
    • Upper Palatinate
      • Waidhaus
M.E. Ciriotti - 05.06.2008 - Probed
  • Hesse
    • Wetzlar
      • Weilburg
        • Essershausen
Blaß, G. & Möhn, G. (2010): Neue Mineralien von der Grube Mark bei Essershausen im Taunus. Mineralien-Welt 21 (2), 26-29.
Italy (TL)
  • Tuscany
    • Arezzo Province
      • Valdarno (Val d'Arno)
        • Cavriglia
G. Pratesi, C. Cipriani, G. Giuli. & W. Birch (2003): Santabarbaraite: a new amorphous phosphate mineral.- Eur. J. Mineral. 15, 185-192
Roberto Bosi
  • Crimea Oblast'
    • Crimea peninsula
Geologiya SSSR (The geology of USSR) (1969) - Nedra (Moscou), 1969, vol. VIII, 575 p.
        • Kerchenskyi (Fe)-ore basin
Chukanov, Nikita, "Minerals of the Kersh iron-ore basin in Eastern Crimea", Mineralogical Almanac (2005), 8, p.70-72; P Haas collection
not refered listen
Arbuzov V.A. et al. (1967) Kerch Iron-Ore Basin (Kerchenskii Zhelezorydny Bassein)/ - Moscow:Nedra. - 576 h/ (Rus.)
            • Katerlez Trough
Kerch Iron-Ore Basin by Nikita V. Chukanov Mineralogical Almanac, volume 8, 2005. Famous Mineral Localities Series 112 pp.,
Chukanov Nikita V. (2005) Minerals of the Kerch iron0ore basin in Eastern Crimea. - Mineralogical Almanac, vol.8, 109 p.; Popov S.P. (1938) Mineralogy of the Crimea (Mineralogiya Kryma). Moscow-Leningrad:izd-vo AN SSSR, 352 p. (Rus.) Chukanov Nikita V. (2005). Minerals of the Kerch iron-ore basin in Eastern Crimea. Mineralogical Almanac, vol.8, 109 p. (Eng.)
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