Minguzzite Mineral Data

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.

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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 - PrismaticH-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

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:

r_electron=2.15 gm/cc
note: r_Minguzzite=2.16 gm/cc.

Fermion Index

Fermion Index = 0.00428
Boson Index = 0.99572

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)

Estimated Radioactivity from Minguzzite - barely detectable

Minguzzite Classification

Dana Class:

50.1.4.1 (50)Salts of Organic Acids

(50.1)(Oxalates)

(50.1.4)Dana Group

50.1.4.1 Minguzzite K3Fe(C2O4)3·3(H2O) P 2₁/c 2/m

Strunz Class:

IX/A.01-60 IX - Organic compunds

IX/A - Oxalates. Salts from organic acids. [C2O4]2- arranged after increasing cation size

IX/A.01 - Whewellite - Wheatleyite series

IX/A.01-05 Natroxalate! Na2C2O4 P 2₁/a 2/m

IX/A.01-10 Whewellite Ca(C2O4)·(H2O) P 2₁/n 2/m

IX/A.01-20 Weddellite Ca(C2O4)·2(H2O) I 4/m 4/m

IX/A.01-25 Caoxite! Ca(C2O4)·3(H2O) P1 1

IX/A.01-28 Novgorodovaite! Ca2(C2O4)Cl2·2(H2O) I2/m 2/m

IX/A.01-30 Oxammite (NH4)2(C2O4)·(H2O) P 2₁2₁2 2 2 2

IX/A.01-40 Glushinskite Mg(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-50 Humboldtine Fe(C2O4)·2(H2O) I2/a 2/m

IX/A.01-55 Lindbergite! Mn(C2O4)·2(H2O) C 2/c 2/m

IX/A.01-60 Minguzzite K3Fe(C2O4)3·3(H2O) P 2₁/c 2/m

IX/A.01-70 Zhemchuzhnikovite NaMg(Al,Fe)(C2O4)3·8(H2O) Unk Trig

IX/A.01-80 Stepanovite NaMgFe(C2O4)3·8-9(H2O) Unk Trig

IX/A.01-90 Moolooite Cu(C2O4)·n(H2O)(n<1) Unk Ortho

IX/A.01-100 Wheatleyite Na2Cu(C2O4)2·2(H2O) P1 1

IX/A.01-110 Coskrenite-(Ce)! (Ce,Nd,La)2(SO4)2(C2O4)·8(H2O) C 2/c 2/m

IX/A.01-120 Levinsonite-(Y)! (Y,Nd,La)Al(SO4)2(C2O4)·12(H2O) P 2/n 2/m

IX/A.01-130 Zugshunstite-(Ce)! (Ce,Nd,La)Al(SO4)2(C2O4)·8(H2O) C 2/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 -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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Minguzzite

K3Fe+++(C2O4)3·3(H2O)
Dana No: 50.1.4.1 Strunz No: IX/A.01-60
Locality:

Notes: