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.

Name Pronunciation:

Souzalite + Pronunciation

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

Diaphaneity:

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= 0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2117,KPDmeas= 0.2065,KC= 0.2181
Ncalc = 1.66 - 1.67

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:

Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Souzalite =3.01 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Souzalite= 3.64 barns/electron
U=PE_Souzalite x rElectron Density= 10.93 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Souzalite is Not Radioactive

Souzalite Classification

Dana Class:

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

(42.09)where (A)3 (XO4)2 Zq · x(H2O)

(42.09.02)Souzalite Group

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

42.09.02.02 Gormanite Fe3Al4(PO4)4(OH)6•2(H2O) P1,P 1 Tri

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

42.09.02.04 Calcioandyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P 2₁/m 2/m

42.09.02.05 Calcioandyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P nma 2/m 2/m 2/m

Strunz Class:

08.DC.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

08.DC.45 Gormanite Fe3Al4(PO4)4(OH)6•2(H2O) P1,P 1 Tri

08.DC.45 Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6•2(H2O) P1,P 1 Tri

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Souzalite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Souzalite Specimen Label here :

Souzalite

(Mg,Fe++)3(Al,Fe+++)4(PO4)4(OH)6•2(H2O)
Dana No: 42.09.02.01 Strunz No: 08.DC.45
Locality:

Notes: