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Mandarinoite

A valid IMA mineral species
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About MandarinoiteHide

02937230014947553029070.jpg
Joseph Anthony Mandarino
Formula:
Fe3+2(Se4+O3)3 · (6-x)H2O (x = 0.0-1.0)
Formula according to Holzheid et al. (2018).
Colour:
Pale yellow green
Lustre:
Vitreous, Greasy
Hardness:
Specific Gravity:
2.93
Crystal System:
Monoclinic
Name:
Named in honor of Joseph Anthony Mandarino (20 April 1929, Chicago, Illinois, USA - 19 September 2007, Toronto, Ontario, Canada), 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.


Unique IdentifiersHide

Mindat ID:
2561
Long-form identifier:
mindat:1:1:2561:0
GUID
(UUID V4):
84b69a45-c113-4cf5-b9bb-c5cfc08b6674

Classification of MandarinoiteHide

Approved
First published:
1978
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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
MdaIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of MandarinoiteHide

Vitreous, Greasy
Transparency:
Transparent
Colour:
Pale yellow green
Comment:
Almost colorless in oil immersion or in thin section.
Streak:
Very pale green
Hardness:
2½ on Mohs scale
Cleavage:
None Observed
Parting:
Parting on {100}
Density:
2.93(3) g/cm3 (Measured)    3.04 g/cm3 (Calculated)

Optical Data of MandarinoiteHide

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 - 1.870
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
strong; type description says none
Pleochroism:
Visible
Comments:
X = colorless; Y = Z = pale green.
Comments:
X = b; Z ∧ c = 2(1)° in the acute angle between a and c.

Chemical Properties of MandarinoiteHide

Formula:
Fe3+2(Se4+O3)3 · (6-x)H2O (x = 0.0-1.0)

Formula according to Holzheid et al. (2018).
IMA Formula:
Fe3+2(Se4+O3)3 · 6H2O

Crystallography of MandarinoiteHide

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 V:
1,313.38 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals are swordlike, in rosettes and subparallel aggregates. Elongate along [001} and flattened parallel to {110}. Forms observed include {100}, {110}, {011} and {101}.
Twinning:
Common as contact twins on {100}.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005198MandarinoiteHawthorne F C (1984) The crystal structure of mandarinoite, Fe2Se3O9.6H2O The Canadian Mineralogist 22 475-48019840293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.10 Å(100)
2.977 Å(70)
3.55 Å(50)
3.43 Å(40)
2.804 Å(20)
1.521 Å(15)
1.482 Å(15)
Comments:
Pacajake mine, Bolivia. The data are from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of MandarinoiteHide

General Appearance of Type Material:
Crystals to 0.5 mm in groups.
Place of Conservation of Type Material:
Royal Ontario Museum, Ottawa, Ontario, Canada, number 35273.
National Museum of Natural History, Washington, D.C., USA, number 142878 (holotype).
Harvard University, Cambridge, Massachusetts, USA, 111364, 111368D.
Geological Setting of Type Material:
Formed by the oxidation of penroseite and pyrite.
Associated Minerals at Type Locality:

Synonyms of MandarinoiteHide

Other Language Names for MandarinoiteHide

Simplified Chinese:水硒铁石
Spanish:Mandarinoita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Mandarinoite associated with ChalcomeniteCuSeO3 · 2H2O

Related Minerals - Strunz-mindat GroupingHide

4.JH.BernardevansiteAl2(SeO3)3 · 6H2OMon. 2/m : P21/b
4.JH.05ChalcomeniteCuSeO3 · 2H2OOrth. 2 2 2 : P21 21 21
4.JH.10AhlfelditeNi(SeO3) · 2H2OMon. 2/m
4.JH.10ClinochalcomeniteCuSeO3 · 2H2OMon.
4.JH.10CobaltomeniteCoSeO3 · 2H2OMon. 2/m
4.JH.20OrlandiitePb3(SeO3)(Cl,OH)4 · H2O Tric. 1 : P1
4.JH.25LarisaiteNa(H3O)(UO2)3(SeO3)O2 · 4H2OMon. m : Pm
4.JH.30NestolaiteCaSeO3 · H2OMon. 2/m : P21/b

Fluorescence of MandarinoiteHide

Not fluorescent.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for MandarinoiteHide

References for MandarinoiteHide

Reference List:

Localities for MandarinoiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Argentina
 
  • Mendoza Province
    • Luján de Cuyo department
      • Cacheuta District
        • Sierra de Cacheuta
          • Cerro de Cacheuta
Australia
 
  • New South Wales
    • Robinson Co.
      • Cobar
Bolivia
 
  • Potosí
    • Antonio Quijarro Province
      • Porco Municipality
    • Chayanta Province
      • Colquechaca Municipality
        • Colquechaca
          • Pakajake Canyon
Chile
 
  • Coquimbo
    • Elqui Province
      • El Indio deposit
China
 
  • Hubei
    • Enshi Autonomous Prefecture (E'xi Autonomous Prefecture)
      • Enshi Co.
Cyprus
 
  • Nicosia District
    • Skouriotissa
Honduras
 
  • Francisco Morazán Department
    • Ojojona
Italy
 
  • Sardinia
    • South Sardinia Province
      • Villaputzu
USA
 
  • Colorado
    • San Miguel County
      • Slick Rock Mining District
  • Idaho
    • Owyhee County
      • De Lamar Mining District
  • Nevada
    • Eureka County
      • Carlin Trend
        • Maggie Creek Mining Subdistrict
      • Lynn Mining District
        • Elko
    • Washoe County
      • San Emidio Mining District
  • Utah
    • Grand County
      • Gateway Mining District
 
Mineral and/or Locality  
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