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Minguzzite

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Formula:
K
 
3
Fe
3+
 
(C
 
2
O
 
4
)
 
3
 · 3H
 
2
O
System:MonoclinicColour:Green, yellow-green
Lustre:Sub-Vitreous
Name:
For University of Parvia, Parvia, Lombardy, Italy mineralogist, Carlo Minguzzi [October 9, 1910 - October 17, 1953].
This page provides mineralogical data about Minguzzite.

Classification of Minguzzite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:9/A.01-60
Nickel-Strunz 10th (pending) edition ID:10.AB.25

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates
Dana 8th edition ID:50.1.4.1

50 : ORGANIC COMPOUNDS
1 : Oxalates
Hey's CIM Ref.:31.1.10

31 : Oxalates, Citrates, Mellitates and Acetates
1 : Oxalates
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Type Occurrence of Minguzzite

Co-type Localities:Cape Calamita Mine (Calamita Mine), Capoliveri, Elba Island, Livorno Province, Tuscany, Italy
Vallone stope, Cape Calamita Mine (Calamita Mine), Capoliveri, Elba Island, Livorno Province, Tuscany, Italy
General Appearance of Type Material:minute tabluar crystals
Year of Discovery:1955
Associated Minerals at type locality:
Humboldtine

Physical Properties of Minguzzite

Lustre:Sub-Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Green, yellow-green
Tenacity:Brittle
Cleavage:Perfect
{010}
Density (measured):2.142 g/cm3
Density (calculated):2.156 g/cm3

Crystallography of Minguzzite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Space Group Setting:P21/c
Cell Parameters:a = 7.66Å, b = 19.87Å, c = 10.27Å
β = 105.1°
Ratio:a:b:c = 0.386 : 1 : 0.517
Unit Cell Volume:V 1,509.17 ų (Calculated from Unit Cell)
Z:4
Morphology:Tabular crystals
X-Ray Powder Diffraction:
d-spacingIntensity
10.2 (50)
6.9 (100)
4.96 (60)
3.61 (70)
3.16 (50)
3.03 (40)
2.67 (60)
2.18 (70)
Comments:ICDD 14-720 (synthetic)

Optical Data of Minguzzite

Type:Biaxial (-)
RI values: nα = 1.498 - 1.501 nβ = 1.554 - 1.555 nγ = 1.594 - 1.597
2V:Measured: 78° , Calculated: 76° to 80°
Birefringence:0.096
Maximum Birefringence:δ = 0.096

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:r > v
Optical Extinction:Inclined
Pleochroism:Strong
Comments:X yellow green, Y,Z emerald green

Chemical Properties of Minguzzite

Formula:
K
 
3
Fe
3+
 
(C
 
2
O
 
4
)
 
3
 · 3H
 
2
O
Essential elements:C, Fe, H, K, O
All elements listed in formula:C, Fe, H, K, O

Relationship of Minguzzite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
10.AB.05Humboldtine
Fe
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.05Lindbergite
Mn
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.10Glushinskite
Mg(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.15Moolooite
Cu(C
 
2
O
 
4
) · 0.4H
 
2
O
10.AB.20Stepanovite
NaMgFe
3+
 
(C
 
2
O
 
4
)
 
3
 · 8-9H
 
2
O
10.AB.30Wheatleyite
Na
 
2
Cu(C
 
2
O
 
4
)
 
2
 · 2H
 
2
O
10.AB.35Zhemchuzhnikovite
NaMg(Fe
3+
 
,Al)(C
 
2
O
 
4
)
 
3
 · 8H
 
2
O
10.AB.40Weddellite
Ca(C
 
2
O
 
4
) · 2H
 
2
O
10.AB.45Whewellite
Ca(C
 
2
O
 
4
) · H
 
2
O
10.AB.50Caoxite
Ca(C
 
2
O
 
4
) · 3H
 
2
O
10.AB.55Oxammite
(NH
 
4
)
 
2
(C
 
2
O
 
4
) · H
 
2
O
10.AB.60Natroxalate
Na
 
2
(C
 
2
O
 
4
)
10.AB.65Coskrenite-(Ce)
(Ce,Nd,La)
 
2
(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.70Levinsonite-(Y)
(Y,Nd,La)Al(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.75Zugshunstite-(Ce)
(Ce,Nd,La)Al(C
 
2
O
 
4
)(SO
 
4
)
 
2
 · 12H
 
2
O
10.AB.80Novgorodovaite
Ca
 
2
(C
 
2
O
 
4
)Cl
 
2
 · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
31.1.1Oxammite
(NH
 
4
)
 
2
(C
 
2
O
 
4
) · H
 
2
O
31.1.2Moolooite
Cu(C
 
2
O
 
4
) · 0.4H
 
2
O
31.1.3Wheatleyite
Na
 
2
Cu(C
 
2
O
 
4
)
 
2
 · 2H
 
2
O
31.1.4Glushinskite
Mg(C
 
2
O
 
4
) · 2H
 
2
O
31.1.5Whewellite
Ca(C
 
2
O
 
4
) · H
 
2
O
31.1.6Weddellite
Ca(C
 
2
O
 
4
) · 2H
 
2
O
31.1.7Humboldtine
Fe
2+
 
(C
 
2
O
 
4
) · 2H
 
2
O
31.1.8Stepanovite
NaMgFe
3+
 
(C
 
2
O
 
4
)
 
3
 · 8-9H
 
2
O
31.1.9Zhemchuzhnikovite
NaMg(Fe
3+
 
,Al)(C
 
2
O
 
4
)
 
3
 · 8H
 
2
O

Other Names for Minguzzite

Other Languages:
German:Minguzzit
Spanish:Minguzzita

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Minguzzite

Reference List:

- +
Analytical Chemistry (1938) v 10, p. 488.
Accademia Nazionale dei Lincei (1955) v 18, p. 392.
American Mineralogist (1956): 41: 370.
Bulletin de Mineralogie (1958): 81: 245-256. (Structure)

Internet Links for Minguzzite

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  • Raman and XRD data at RRUFF project
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    • Localities for Minguzzite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Tuscany
      • Livorno Province
        • Elba Island
          • Capoliveri
    		Atti Accad.Lincei.Rend.Cl.Sci.fis.mat.nat., Roma (1955) ser.8, 18, 392-402
    C.L. Garavelli (1955) – Un nuovo minerale tra i prodotti secondari del giacimento di Capo Calamita (Isola d ' Elba). – Atti Acc. Naz. Lincei, Rend., v.18, s.8, f.4: 392-402.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 21:23:17
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