Minguzzite Mineral Data

General Minguzzite Information

Chemical Formula:

K3Fe+++(C2O4)3•3(H2O)

Composition:

Molecular Weight = 491.25 gm

Potassium 23.88 % K 28.76 % K₂O

Iron 11.37 % Fe 16.25 % Fe₂O₃

Hydrogen 1.23 % H 11.00 % H₂O

Carbon 14.67 % C 43.98 % C₂O₃

Oxygen 48.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K₃Fe³⁺(C₂O₄)₃•3(H₂O)

Environment:

In limonite.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Cape Calamita, Elba, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for Carlo Minguzzi (1910-1953), Italian mineralogist and professor, University of Pavia.

Name Pronunciation:

Minguzzite + Pronunciation

Minguzzite Crystallography

Axial Ratios:

a:b:c =0.3855:1:0.5168

Cell Dimensions:

a = 7.66, b = 19.87, c = 10.27, Z = 4; beta = 105.1° V = 1,509.17 Den(Calc)= 2.16

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 6.9(1), 2.18(0.65), 3.61(0.65),

Physical Properties of Minguzzite

Cleavage:

{010} Perfect

Color:

Green, Yellow green.

Density:

2.092 - 2.142, Average = 2.11

Habit:

Tabular - Form dimensions are thin in one direction.

Luster:

Vitreous (Glassy)

Optical Properties of Minguzzite

Gladstone-Dale:

CI meas= -0.791 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.756 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2546,KPDmeas= 0.2597,KC= 0.145
Ncalc = 1.3 - 1.31

Optical Data:

Biaxial (-), a=1.498-1.501, b=1.554-1.555, g=1.594-1.597, bire=0.0960, 2V(Calc)=76-80, 2V(Meas)=78.

Pleochroism (x):

yellow green.

Pleochroism (y):

emerald green.

Pleochroism (z):

emerald green.

Calculated Properties of Minguzzite

Electron Density:

Bulk Density (Electron Density)=2.15 gm/cc
note: Specific Gravity of Minguzzite =2.16 gm/cc.

Fermion Index:

Fermion Index = 0.004288805
Boson Index = 0.995711195

Photoelectric:

PE_Minguzzite= 5.87 barns/electron
U=PE_Minguzzite x r_electron= 12.65 barns/cc.

Radioactivity:

GRapi = 343.65 (Gamma Ray American Petroleum Institute Units)
Concentration of Minguzzite per GRapi unit = 0.29 (%)

Estimated Radioactivity from Minguzzite - barely detectable

Minguzzite Classification

Dana Class:

50.01.04.01 (50)Salts of Organic Acids

(50.01)(Oxalates)

(50.01.04)Dana Group

50.01.04.01 Minguzzite K3Fe(C2O4)3•3(H2O) P 2₁/c 2/m

Strunz Class:

10.AB.25 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AB -Oxalates

10.AB.25 Minguzzite K3Fe(C2O4)3•3(H2O) P 2₁/c 2/m

Other Minguzzite Information

References:

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

See Also:

Links to other databases for Minguzzite :
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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Print or Cut-and-Paste your Minguzzite Specimen Label here :

Minguzzite

K3Fe+++(C2O4)3•3(H2O)
Dana No: 50.01.04.01 Strunz No: 10.AB.25
Locality:

Notes:

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