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Mandarinoite

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Formula:
Fe
3+
2
(SeO
 
3
)
 
3
· 4H
 
2
O
System:MonoclinicColour:Pale yellow green
Lustre:Vitreous, GreasyHardness:
Name:Named in honor of Joseph Anthony Mandarino (1929-2007), American-Canadian mineralogist, former Curator of Mineralogy, Royal Ontario Museum, Toronto, Ontario, for his many outstanding contributions to mineralogy, “in particular the insights he has provided into the relationships of the Gladstone-Dale rule.” He also contributed greatly to the formalization of mineral systematics as Chairman of IMA CNMMN.


A secondary mineral found in the oxidized zones of selenium- and iron-bearing deposits.

Classification of Mandarinoite

IMA status:Approved
Strunz 8th edition ID:4/K.08-10
Nickel-Strunz 10th (pending) edition ID:4.JH.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
H : Selenites without additional anions, with H2O
Dana 8th edition ID:34.3.4.1

34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
Hey's CIM Ref.:28.1.11

28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
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Type Occurrence of Mandarinoite

Type Locality:Virgen de Surumi mine (Pacajake mine; Pakajake mine), Pakajake Canyon (Pacajake Canyon), Chayanta Province, Potosí Department, Bolivia
Place of Conservation of Type Material:Royal Ontario Museum, Ottawa, Canada 35273
Year of Discovery:1978
Geological Setting of type material:Formed by the oxidation of penroseite and pyrite.

Physical Properties of Mandarinoite

Lustre:Vitreous, Greasy
Diaphaneity (Transparency):Transparent
Colour:Pale yellow green
Streak:Very pale green
Hardness (Mohs):
Parting:Parting on {100}
Density (measured):2.93(3) g/cm3
Density (calculated):3.04 g/cm3

Crystallography of Mandarinoite

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}
Cell Parameters:a = 16.81(4) Å, b = 7.88(2) Å, c = 10.019(2) Å
β = 98.26(2)°
Ratio:a:b:c = 2.133 : 1 : 1.271
Unit Cell Volume:V 1,313.38 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals are swordlike, in rosettes and subparallel aggregates.
Twinning:Common as contact twins on {100}

Optical Data of Mandarinoite

Type:Biaxial (-)
RI values: nα = 1.715 nβ = 1.797 - 1.800 nγ = 1.860 - 1.870
2V:Measured: 80° to 85°, Calculated: 80°
Maximum Birefringence:δ = 0.145 - 0.155

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:strong
Pleochroism:Visible
Comments:X= colorless
Y=Z= pale green

Chemical Properties of Mandarinoite

Formula:
Fe
3+
2
(SeO
 
3
)
 
3
· 4H
 
2
O
Simplified for copy/paste:Fe3+2(SeO3)3·4H2O
Essential elements:Fe, H, O, Se
All elements listed in formula:Fe, H, O, Se
Empirical Formula:
Fe
3+
2
Se
 
3
O
 
9
· 4H
 
2
O

Relationship of Mandarinoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JH.05Chalcomenite
CuSeO
 
3
· 2H
 
2
O
4.JH.10Ahlfeldite
(Ni,Co)SeO
 
3
· 2H
 
2
O
4.JH.10Clinochalcomenite
CuSeO
 
3
· 2H
 
2
O
4.JH.10Cobaltomenite
CoSeO
 
3
· 2H
 
2
O
4.JH.20Orlandiite
Pb
 
10
(SeO
 
4
)O
 
7
Cl
 
4
· H
 
2
O
4.JH.20UM1999-29-SeO:ClCuHPb
Pb
 
4
Cu(SeO
 
3
)
 
3
(OH)Cl
 
3
4.JH.25Larisaite
Na(H
 
3
O)(UO
 
2
)
 
3
(SeO
 
3
)O
 
2
· 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
28.1.1Chalcomenite
CuSeO
 
3
· 2H
 
2
O
28.1.2Clinochalcomenite
CuSeO
 
3
· 2H
 
2
O
28.1.3Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
28.1.4Sofiite
Zn
 
2
(SeO
 
3
)Cl
 
2
28.1.5Molybdomenite
PbSeO
 
3
28.1.6Haynesite
(UO
 
2
)
 
3
(OH)
 
2
(SeO
 
3
)
 
2
· 5H
 
2
O
28.1.7Derriksite
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
· H
 
2
O
28.1.8Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
2
· 7H
 
2
O
28.1.9Guilleminite
Ba(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
· 3H
 
2
O
28.1.10Demesmaekerite
Pb
 
2
Cu
 
5
(UO
 
2
)
 
2
(SeO
 
3
)
 
6
(OH)
 
6
· 2H
 
2
O
28.1.12Cobaltomenite
CoSeO
 
3
· 2H
 
2
O
28.1.13Ahlfeldite
(Ni,Co)SeO
 
3
· 2H
 
2
O

Other Names for Mandarinoite

Synonyms:
IMA1977-049
Other Languages:
German:Mandarinoit
Russian:Мандариноит
Simplified Chinese:水硒铁石
Spanish:Mandarinoita

Other Information

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 Mandarinoite

Reference List:

- +
DUNN, P.J., PEACOR, D.R. & STURMAN, B.D. (1978): Mandarinoite, a new ferric-iron selenite from Bolivia. Canadian Mineralogist 16, 605-609.
HAWTHORNE, F.C. (1984): The crystal structure of mandarinoite,Fe3+2Se3O96H2O. Canadian Mineralogist 22, 475-480.


Internet Links for Mandarinoite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mandarinoite details from Handbook of Mineralogy (PDF)
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  • Localities for Mandarinoite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    Australia
     
    • New South Wales
      • Robinson Co.
        • Cobar
          • Cobar
    http://leme.anu.edu.au/Pubs/Advancesinregolith/Leverett_et_al.pdf
          • Kaloogleguy
    Leverett, P., McKinnon, A. R., Sharpe, J. L. and Williams, P. A. (2005): Secondary minerals from the central Cobar mines. Australian Journal of Mineralogy, 11, 75-82.
    Bolivia
     
    • Potosí Department
      • Antonio Quijarro Province
    [MinRec 21:133]
      • Chayanta Province
        • Pakajake Canyon (Pacajake Canyon)
    DUNN, P.J., PEACOR, D.R. & STURMAN, B.D. (1978): Mandarinoite, a new ferric-iron selenite from Bolivia. Canadian Mineralogist 16, 605-609. HAWTHORNE, F.C. (1984): The crystal structure of mandarinoite,Fe3+2Se3O96H2O. Canadian Mineralogist 22, 475-480.
    China
     
    • Hubei Province
      • Enshi Autonomous Prefecture (E'xi Autonomous Prefecture)
        • Enshi Co.
    Zhu Jian-Ming, and Zheng Bao-Shan (2002): Journal of the Graduate School of the Chinese Academy of Sciences 19(2), 219-221; Handong Qian, Zhenghua Zhao, Xiang Zheng, Chengyi Lin, Jiahu Zeng, Xuemei Wu, and Wu Chen (2006): Acta Geologica Sinica 80(11), 1706-1710
    Cyprus
     
    • Nicosia District (Lefkoşa District; Lefkosia District)
      • Skouriotissa
    Rocks & Min.: 64:48.
    Honduras
     
    • Francisco Morazán Department
      • Distrito Central
        • Tegucigalpa
          • Ojojona
    Rocks & Min.:64:48.
    Italy
     
    • Sardinia
      • Cagliari Province
        • Villaputzu
    Campostrini, I. & Gramaccioli, C. M. (2001): Selenium-rich secondary minerals from the Baccu Locci mine (Sardinia, Italy). Neues Jahrbuch fuer Mineralogie, Abhandlungen 177, 37-59.
    USA
     
    • Colorado
      • San Miguel Co.
        • Uravan District
    Collected by and in the collection of Brent Thorne.
    • Idaho
      • Owyhee Co.
        • De Lamar District
    Rocks & Min.:64:48.; Can Mineral 1981 19: 409-410
    • Nevada
      • Eureka Co.
        • Carlin Trend
          • Maggie Creek Subdistrict
    MinRec 26(5):449-469.
        • Lynn District
          • Elko
    MinRecord 26:467
      • Washoe Co.
        • San Emidio District
    NBMG Spec. Pub. 31 Minerals of Nevada
    • Utah
      • Grand Co.
        • Polar Mesa District (Polar Mesa)
    Collected by and in the collection of Brent Thorne.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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.
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