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|System:||Monoclinic||Colour:||Blue-green, dark ...|
|Hardness:||5½ - 6|
|Name:||Named after Antonio José Alves de Souza, Director of the Departamento national da producao mineral (Brazil).|
Gormanite-Souzalite Series. The magnesium analogue of Gormanite.
Occurs as a hydrothermal alteration product of Scorzalite in pegmatite.
Classification of Souzalite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"|
|Strunz 8th edition ID:||7/D.11-90|
|Nickel-Strunz 10th (pending) edition ID:||8.DC.45|
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
|Dana 8th edition ID:||18.104.22.168|
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
|Hey's CIM Ref.:||19.14.31|
19 : Phosphates
14 : Phosphates of Fe and other metals
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Type Occurrence of Souzalite
|Type Locality:||Córrego Frio mine, Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Brazil|
|Year of Discovery:||1947|
|Geological Setting of type material:||Pegmatite|
Physical Properties of Souzalite
|Colour:||Blue-green, dark gray-green|
|Hardness (Mohs):||5½ - 6|
Two directions at approximate right angles. One good and one fair.
|Density (measured):||3.087 g/cm3|
Crystallography of Souzalite
|Morphology:||Coarse fibrous masses.|
|Twinning:||Polysynthetic twinning with the composition plane parallel to the good cleavage direction.|
Optical Data of Souzalite
|RI values:||nα = 1.618 nβ = 1.642 nγ = 1.652|
|2V:||Measured: 68° , Calculated: 64°|
|Maximum Birefringence:||δ = 0.034|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r > v|
|Comments:||X perpendicular to cleavage = Green|
Y = Blue
Z = elongation = Yellow
Chemical Properties of Souzalite
|Simplified for copy/paste:||(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6·2H2O|
|Essential elements:||Al, H, Mg, O, P|
|All elements listed in formula:||Al, Fe, H, Mg, O, P|
Relationship of Souzalite to other Species
|Series:||Forms a series with Gormanite (see here)|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Souzalite
|Other Information:||Soluble with difficulty in HCl.|
|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 Souzalite
American Mineralogist (1948): 33: 205 (Proceedings of the 28 Annual Meeting).
Pecora, W.T. and Fahey, J.J. (1949) The Corrego Frio pegmatite, Minas Gerais: Scorzalite and souzalite, two new phosphate minerals. American Mineralogist: 34: 83-93.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 911-912.
Canadian Mineralogist (1981): 19: 381-387.
European Journal of Mineralogy (2003): 15: 719-723.
Internet Links for Souzalite
Localities for Souzalite
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.