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 % K2 O
Iron 11.37 % Fe 16.25 % Fe2 O3
Hydrogen 1.23 % H 11.00 % H2 O
Carbon 14.67 % C 43.98 % C2 O3
Oxygen 48.85 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
K3 Fe3+ (C2 O4 )3 •3(H2 O)
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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEMinguzzite = 5.87 barns/electronU=PEMinguzzite 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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