Souzalite Mineral Data

Souzalite Mineral Data +

General Souzalite Information

Chemical Formula:

(Mg,Fe++)3(Al,Fe+++)4(PO4)4(OH)6·2(H2O)

Composition:

Molecular Weight = 729.00 gm

Magnesium 8.33 % Mg 13.82 % MgO

Aluminum 12.95 % Al 24.48 % Al₂O₃

Iron 7.66 % Fe 4.93 % FeO / 5.48 % Fe₂O₃

Phosphorus 17.00 % P 38.94 % P₂O₅

Hydrogen 1.38 % H 12.36 % H₂O

Oxygen 52.67 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_2.5Fe²⁺_0.5Al_3.5Fe³⁺_0.5(PO₄)₄(OH)₆·2(H₂O)

Environment:

Forms a series with gormanite.

IMA Status:

Valid Species (Pre-IMA) 1949

Locality:

Linopolis district, N of Dimino das Laranjeiras, Minas Gerias, Brazil. Link to MinDat.org Location Data.

Name Origin:

Named for J. A. De Souza (1896-1961), director of Departamento Nacional de Producao Minera, Brazil.

Souzalite Image

Images:

Souzalite

Comments: Blue-gray radial sprays of souzalite in brown siderite.
Location: Rapid Creek, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Souzalite Crystallography

Axial Ratios:

a:b:c =2.2974:1:2.6575

Cell Dimensions:

a = 11.74, b = 5.11, c = 13.58, Z = 2; alpha = 90.92°, beta = 99.08°, gamma = 90.33° V = 804.36 Den(Calc)= 3.01

Crystal System:

TriclinicSpace Group: P1,P 1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.386(1), 2.553(0.9), 2.921(0.8),

Crystal Structure:

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Le Bail A , Stephens P W , Hubert F , European Journal of Mineralogy , 15 (2003) p.719-723, A crystal structure for the souzalite/gormanite series from synchrotron, powder diffraction data, Locality: Rapid Creek, Yukon, Canada

Physical Properties of Souzalite

Cleavage:

[001] Indistinct, [1] Fair

Color:

Blue green, Dark green.

Density:

3.087

Diaphaniety:

Translucent

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Souzalite

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2117,KPDmeas= 0.2065,KC= 0.2088

Optical Data:

Biaxial (-), a=1.618, b=1.642, g=1.652, bire=0.0340, 2V(Calc)=64, 2V(Meas)=68. Dispersion r > v.

Pleochroism (x):

colorless.

Pleochroism (y):

blue.

Pleochroism (z):

colorless.

Calculated Properties of Souzalite

Electron Density:

r_electron=3.08 gm/cc
note: r_Souzalite=3.09 gm/cc.

Fermion Index

Fermion Index = 0.01021
Boson Index = 0.98979

Photoelectric:

PE_Souzalite= 3.64 barns/electron
U=PE_Souzalite x r_electron= 11.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Souzalite is Not Radioactive

Souzalite Classification

Dana Class:

42.9.2.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.9)where (A)3 (XO4)2 Zq · x(H2O)

(42.9.2)Dana Group

42.9.2.1 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

42.9.2.2 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

42.9.2.3 Andyrobertsite! KCdCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

42.9.2.4 Calcio-andyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P 2₁/m 2/m

42.9.2.5 Calcio-andyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]·2(H2O) P nma 2/m 2/m 2/m

Strunz Class:

VII/D.11-90 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of medium size: Cu, Zn, Mn, Al, Fe

VII/D.11 - Strunzite series

VII/D.11-10 Ferrostrunzite FeFe2(PO4)2(OH)2·6(H2O) P 1,P1 Tri

VII/D.11-20 Strunzite MnFe2(PO4)2(OH)2·6(H2O) P1 1

VII/D.11-30 Ferristrunzite FeFe2(PO4)2(OH)3·5(H2O) P1,P 1 Tri

VII/D.11-40 Bermanite MnMn2(PO4)2(OH)2·4(H2O) P 2₁ 2

VII/D.11-50 Cacoxenite (Fe,Al)25(PO4)17O6(OH)12·75(H2O) P 6/mmm 6/m 2/m 2/m

VII/D.11-60 Tinticite Fe5(PO4,VO4)4·7(H2O) P1 1

VII/D.11-70 Beraunite FeFe5(PO4)4(OH)5·4(H2O) C 2/c 2/m

VII/D.11-71 Oxiberaunite* (Fe,Mn)Fe5(PO4)4O(OH)4·6(H2O) Mono

VII/D.11-90 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-100 Gormanite Fe3Al4(PO4)4(OH)6·2(H2O) P1,P 1 Tri

VII/D.11-110 Dufrenite FeFe4(PO4)3(OH)5·2(H2O) C 2/c 2/m

VII/D.11-120 Burangaite (Na,Ca)2(Fe,Mg)2Al10(PO4)8(OH,O)12·4(H2O) C 2/c 2/m

VII/D.11-130 Natrodufrenite Na(Fe,Fe)(Fe,Al)5(PO4)4(OH)6·2(H2O) C 2/c 2/m

VII/D.11-135 Ercitite! Na(Mn,Fe)(PO4)(OH)·2(H2O) P 2₁/n 2/m

VII/D.11-140 Kidwellite Na(Fe,Cu)9x(PO4)6(OH)11·3(H2O) P 2/c 2/m

VII/D.11-150 Meurigite! KFe7(PO4)5(OH)7·8(H2O) C 2,Cm,C 2/m Mono

Other Souzalite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Souzalite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Souzalite

(Mg,Fe++)3(Al,Fe+++)4(PO4)4(OH)6·2(H2O)
Dana No: 42.9.2.1 Strunz No: VII/D.11-90
Locality:

Notes: