Mandarinoite
A valid IMA mineral species
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About Mandarinoite
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:
2½
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 Identifiers
Mindat ID:
2561
Long-form identifier:
mindat:1:1:2561:0
GUID
(UUID V4):
(UUID V4):
84b69a45-c113-4cf5-b9bb-c5cfc08b6674
IMA Classification of Mandarinoite
Classification of Mandarinoite
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
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
34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
28.1.11
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mda | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mandarinoite
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 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.
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.
Chemistry of Mandarinoite
Mindat Formula:
Fe3+2(Se4+O3)3 · (6-x)H2O (x = 0.0-1.0)
Formula according to Holzheid et al. (2018).
Formula according to Holzheid et al. (2018).
Elements listed:
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)°
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 Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0005198 | Mandarinoite | Hawthorne F C (1984) The crystal structure of mandarinoite, Fe2Se3O9.6H2O The Canadian Mineralogist 22 475-480 | 1984 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Mandarinoite
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.
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 Mandarinoite
Other Language Names for Mandarinoite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Mandarinoite associated with Chalcomenite | CuSeO3 · 2H2O |
Related Minerals - Strunz-mindat Grouping
4.JH. | Bernardevansite | Al2(SeO3)3 · 6H2O |
4.JH.05 | Chalcomenite | CuSeO3 · 2H2O |
4.JH.10 | Ahlfeldite | Ni(SeO3) · 2H2O |
4.JH.10 | Clinochalcomenite | CuSeO3 · 2H2O |
4.JH.10 | Cobaltomenite | CoSeO3 · 2H2O |
4.JH.20 | Orlandiite | Pb3(SeO3)(Cl,OH)4 · H2O |
4.JH.25 | Larisaite | Na(H3O)(UO2)3(SeO3)O2 · 4H2O |
4.JH.30 | Nestolaite | CaSeO3 · H2O |
Fluorescence of Mandarinoite
Not fluorescent.
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.
Internet Links for Mandarinoite
mindat.org URL:
https://www.mindat.org/min-2561.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Mandarinoite
Reference List:
Dunn, P. J., Peacor, D. R., Sturman, B. D. (1978) Mandarinoite, a new ferric-iron selenite from Bolivia. The Canadian Mineralogist, 16 (4) 605-609
Hawthorne, Frank C. (1984) The crystal structure of mandarinoite, Fe3+2Se3O9 · 6H2O. The Canadian Mineralogist, 22 (3) 475-480
Localities for Mandarinoite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Argentina | |
| Grundmann et al. (2018) |
Australia | |
| Leverett et al. (2003) |
Leverett et al. (2005) | |
Bolivia | |
| doi:10.3390/min7050068 +2 other references |
| Dunn et al. (1978) +1 other reference |
Chile | |
| Back et al. (2017) |
China | |
| Zhu +7 other references |
Cyprus | |
| Rocks & Min.: 64:48. |
Honduras | |
| Rocks & Min.:64:48. |
Italy | |
| Campostrini et al. (1999) +1 other reference |
USA | |
| Collected by and in the collection of ... |
| Lasmanis et al. (1981) +2 other references |
| Jensen et al. (1995) |
| Mineralogical Record 26:467 |
| Castor et al. (2004) |
| Collected by and in the collection of ... |
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El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia