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Mandarinoite

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Formula:
Fe23+(SeO3)3 · 4H2O
System:
Monoclinic
Colour:
Pale yellow green
Lustre:
Vitreous, Greasy
Hardness:
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

Approved
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
34.3.4.1

34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
28.1.11

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

Place of Conservation of First Recorded Material:
Royal Ontario Museum, Ottawa, Canada 35273
Year of Discovery:
1978
Geological Setting of First Recorded Material:
Formed by the oxidation of penroseite and pyrite.

Physical Properties of Mandarinoite

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

Crystallography of Mandarinoite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
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°
Max Birefringence:
δ = 0.145 - 0.155
Image 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:
Fe23+(SeO3)3 · 4H2O
Essential elements:
All elements listed in formula:
Empirical Formula:
Fe23+Se3O9 · 4H2O

Relationship of Mandarinoite to other Species

4.JH.05ChalcomeniteCuSeO3 · 2H2O
4.JH.10Ahlfeldite(Ni,Co)SeO3 · 2H2O
4.JH.10ClinochalcomeniteCuSeO3 · 2H2O
4.JH.10CobaltomeniteCoSeO3 · 2H2O
4.JH.20OrlandiitePb10(SeO4)O7Cl4 · H2O
4.JH.20UM1999-29-SeO:ClCuHPbPb4Cu(SeO3)3(OH)Cl3
4.JH.25LarisaiteNa(H3O)(UO2)3(SeO3)O2 · 4H2O
28.1.1ChalcomeniteCuSeO3 · 2H2O
28.1.2ClinochalcomeniteCuSeO3 · 2H2O
28.1.3FrancisiteCu3Bi(SeO3)2O2Cl
28.1.4SofiiteZn2(SeO3)Cl2
28.1.5MolybdomenitePbSeO3
28.1.6Haynesite(UO2)3(OH)2(SeO3)2 · 5H2O
28.1.7DerriksiteCu4(UO2)(SeO3)2(OH)6 · H2O
28.1.8MarthoziteCu(UO2)3(SeO3)2(OH)2 · 8H2O
28.1.9GuilleminiteBa(UO2)3(SeO3)2(OH)4 · 3H2O
28.1.10DemesmaekeritePb2Cu5(UO2)2(SeO3)6(OH)6 · 2H2O
28.1.12CobaltomeniteCoSeO3 · 2H2O
28.1.13Ahlfeldite(Ni,Co)SeO3 · 2H2O

Other Names for Mandarinoite

Name in Other Languages:
Simplified Chinese:水硒铁石
Spanish:Mandarinoita

Other Information

Health Risks:
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

Localities for Mandarinoite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Mineral and/or Locality  
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