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|System:||Amorphous||Colour:||Orange, orange brown, ...|
|Name:||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
|IMA status:||Approved 2000|
|Strunz 8th edition ID:||7/D.11-105|
|Nickel-Strunz 10th (pending) edition ID:||8.CE.80|
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
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Type Occurrence of Santabarbaraite
|Type Locality:||Santa Barbara lignite District, Cavriglia, Valdarno (Val d'Arno), Arezzo Province, Tuscany, Italy|
|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
|Lustre:||Sub-Vitreous, Resinous, Waxy, Greasy|
|Diaphaneity (Transparency):||Transparent, Translucent|
|Colour:||Orange, orange brown, yellowish-brown|
|Streak:||yellow to yellowish-brown|
|Parting:||parting according to the vivianite cleavage|
|Density (measured):||2.42 g/cm3|
Crystallography of Santabarbaraite
|Morphology:||Pseudomorphs of vivianite or botryoidal crusts.|
|Comment:||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|
|Maximum Birefringence:||δ = 0.000 - Isotropic minerals have no birefringence|
Chemical Properties of Santabarbaraite
|Simplified for copy/paste:||Fe3+3(PO4)2(OH)3·5H2O|
|Essential elements:||Fe, H, O, P|
|All elements listed in formula:||Fe, H, O, P|
Relationship of Santabarbaraite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Santabarbaraite
|Fluorescence in UV light:||Not fluorescent in UV|
|Health Warning:||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
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
The 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. ? 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.