Scorzalite Mineral Data

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General Scorzalite Information

Chemical Formula:

(Fe++,Mg)Al2(PO4)2(OH)2

Composition:

Molecular Weight = 325.88 gm

Magnesium 1.86 % Mg 3.09 % MgO

Aluminum 16.56 % Al 31.29 % Al₂O₃

Iron 12.85 % Fe 16.54 % FeO

Phosphorus 19.01 % P 43.56 % P₂O₅

Hydrogen 0.62 % H 5.53 % H₂O

Oxygen 49.10 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.75Mg_0.25Al₂(PO₄)₂(OH)₂

Environment:

Highly aluminous metamorphic rocks and granitic pegmatites. Forms a series with lazulite.

IMA Status:

Valid Species (Pre-IMA) 1947

Locality:

Corrego Firo pegmatite, Minas Gerias, Brazil. Link to MinDat.org Location Data.

Name Origin:

Named for Everisto Pena Scorza (1899-?), Brazilian mineralogist, Mineral Survey of Brazil.

Name Pronunciation:

Scorzalite + Pronunciation

Synonym:

ICSD 26497

PDF 35-632

Scorzalite Image

Images:

Scorzalite

Comments: Deep blue scorzalite with muscovite, quartz, and feldspar in matrix.
Location: Polermo Mine, North Groten, New Hampshire, USA. Scale: 5 x 3.5 cm.
© John Veevaert

Scorzalite Crystallography

Axial Ratios:

a:b:c =0.9801:1:0.9926

Cell Dimensions:

a = 7.1568, b = 7.3018, c = 7.2481, Z = 2; beta = 120.588° V = 326.06 Den(Calc)= 3.32

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/c

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

By Intensity(I/I_o): 3.206(1), 3.246(0.75), 3.152(0.5),

Crystal Structure:

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Lindberg M L , Christ C L , Acta Crystallographica , 12 (1959) p.695-697, Crystal structures of the isostructural minerals lazulite,, scorzalite and barbosalite

Physical Properties of Scorzalite

Cleavage:

{110} Good

Color:

Dark blue, Greenish blue.

Density:

3.27

Diaphaneity:

Subtranslucent to Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Scorzalite

Gladstone-Dale:

CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1936,KPDmeas= 0.1965,KC= 0.2005
Ncalc = 1.66 - 1.67

Optical Data:

Biaxial (-), a=1.604-1.639, b=1.626-1.67, g=1.637-1.68, bire=0.0330-0.0410, 2V(Calc)=58-68, 2V(Meas)=62. Dispersion r > v.

Pleochroism (x):

colorless.

Pleochroism (y):

blue.

Pleochroism (z):

darker blue.

Calculated Properties of Scorzalite

Electron Density:

Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Scorzalite =3.27 gm/cc.

Fermion Index:

Fermion Index = 0.004825955
Boson Index = 0.995174045

Photoelectric:

PE_Scorzalite= 5.24 barns/electron
U=PE_Scorzalite x rElectron Density= 16.89 barns/cc.

Radioactivity:

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

Scorzalite Classification

Dana Class:

41.10.01.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.01)Lazulite Group

41.10.01.01 Lazulite MgAl2(PO4)2(OH)2 P 2₁/c 2/m

41.10.01.02 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

41.10.01.03 Hentschelite CuFe2(PO4)2(OH)2 P 2₁/n 2/m

41.10.01.04 Barbosalite FeFe2(PO4)2(OH)2 P 2₁/c 2/m

Strunz Class:

08.BB.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1

08.BB.40 Barbosalite FeFe2(PO4)2(OH)2 P 2₁/c 2/m

08.BB.40 Wilhelmkleinite! ZnFe3(AsO4)2(OH)2 P 2₁/n 2/m

08.BB.40 Hentschelite CuFe2(PO4)2(OH)2 P 2₁/n 2/m

08.BB.40 Lazulite MgAl2(PO4)2(OH)2 P 2₁/c 2/m

08.BB.40 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

Other Scorzalite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Sinkankas66)

See Also:

Links to other databases for Scorzalite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Scorzalite

(Fe++,Mg)Al2(PO4)2(OH)2
Dana No: 41.10.01.02 Strunz No: 08.BB.40
Locality:

Notes: