Argandite (original) (raw)
A valid IMA mineral species
About ArganditeHide
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Crystal System:
Monoclinic
Name:
Named in honour of Emile Argand (1879-1940), Swiss geologist and mineralogist, who studied the tectonics of the Alps and of Asia. Argand was an early supporter of Wegener's theory of continental drift.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:40277:2
0a4514af-8383-4390-87df-47631466e223
IMA Classification of ArganditeHide
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Classification of ArganditeHide
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8.BE.30
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
41.2.1.4
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
2 : (AB)7(XO4)2Zq
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Agd | 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 ArganditeHide
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Cleavage:
Distinct/Good
Probably parallel to {001}.
Density:
3.71(5) g/cm3 (Measured) 3.67(1) g/cm3 (Calculated)
Optical Data of ArganditeHide
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RI values:
_n_α = 1.740 _n_β = 1.762(4) _n_γ = 1.770
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
Orange-yellow to orange.
Chemistry of ArganditeHide
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Mindat Formula:
Mn7(VO4)2(OH)8
Crystallography of ArganditeHide
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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.498(2) Å, b = 12.265(3) Å, c = 10.092(2) Å
β = 95.594(3)°
Ratio:
a:b:c = 0.448 : 1 : 0.823
Unit Cell V:
677.29 ų (Calculated from Unit Cell)
Morphology:
Anhedral grains.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018517 | Argandite | Brugger J, Elliott P, Meisser N, Ansermet S (2011) Argandite, Mn7(VO4)2(OH)8, the V analogue of allactite from the metamorphosed Mn ores at Pipji, Turtmann Valley, Switzerland American Mineralogist 96 1894-1900 | 2011 | Pipji, Turtmann Valley, Switzerland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.708 Å | (50) |
| 3.395 Å | (60) |
| 3.074 Å | (100) |
| 2.945 Å | (50) |
| 2.687 Å | (70) |
| 2.522 Å | (50) |
| 2.324 Å | (40) |
| 1.791 Å | (40) |
Comments:
Pipjitälli, Valais, Switzerland. The data are from the type description.
Geological EnvironmentHide
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Type Occurrence of ArganditeHide
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General Appearance of Type Material:
Argandite occurs as a rock-forming mineral in a manganosite-rich specimen. It forms orange anhedral grains up to 60 micron in diameter.
Place of Conservation of Type Material:
Geological Museum, Lausanne, Switzerland, reg. no. MGL90369.
Geological Setting of Type Material:
Metamorphosed synsedimentary exhalative Mn deposit.
Associated Minerals at Type Locality:
Synonyms of ArganditeHide
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Relationship of Argandite to other SpeciesHide
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Other Members of this group:
Related Minerals - Strunz-mindat GroupingHide
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| 8.BE.05 | Augelite | Al2(PO4)(OH)3 | Mon. 2/m : _B_2/m |
|---|---|---|---|
| 8.BE.10 | Grattarolaite | Fe3+3(PO4)O3 | Trig. 3_m_ : R_3_m |
| 8.BE.15 | Cornetite | Cu3(PO4)(OH)3 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.BE.20 | Clinoclase | Cu3(AsO4)(OH)3 | Mon. 2/m : _P_21/b |
| 8.BE.25 | Arhbarite | Cu2Mg(AsO4)(OH)3 | Tric. 1 : _P_1 |
| 8.BE.25 | Gilmarite | Cu3(AsO4)(OH)3 | Tric. 1 : _P_1 |
| 8.BE.30 | Allactite | Mn2+7(AsO4)2(OH)8 | Mon. 2/m : _P_21/b |
| 8.BE.30 | Flinkite | Mn2+2Mn3+(AsO4)(OH)4 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.BE.30 | Raadeite | Mg7(PO4)2(OH)8 | Mon. 2/m |
| 8.BE.35 | Chlorophoenicite | (Mn,Mg)3Zn2(AsO4)(OH,O)6 | Mon. 2/m : _B_2/m |
| 8.BE.35 | Magnesiochlorophoenicite | (Mg,Mn)3Zn2(AsO4)(OH,O)6 | Mon. 2/m : _B_2/m |
| 8.BE.35 | Mineral E (of Dunn, et. al., 1982) | Orth. m m m _(_2/_m_2/_m_2/m ) | |
| 8.BE.40 | Gerdtremmelite | (Zn,Fe)(Al,Fe)2(AsO4)(OH)5 | Tric. |
| 8.BE.45 | Dixenite | CuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6 | Trig. 3 : _R_3 |
| 8.BE.45 | Hematolite | (Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23 | Trig. 3 : _R_3 |
| 8.BE.45 | Kraisslite | Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16 | Orth. 222 : _C_2221 |
| 8.BE.45 | Mcgovernite | Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21 | Trig. 3_m_ _(_32/m ) |
| 8.BE.45 | Arakiite | (Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)23 | Mon. m : B b |
| 8.BE.45 | Turtmannite | (Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+x | Trig. |
| 8.BE.45 | Carlfrancisite | Mn2+3(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42 | Trig. 3_m_ _(_32/m ) : R_3_c |
| 8.BE.50 | Synadelphite | Mn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 8.BE.55 | Holdenite | (Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8 | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c a |
| 8.BE.60 | Kolicite | Mn2+7Zn4(AsO4)2(SiO4)2(OH)8 | Orth. m m m _(_2/_m_2/_m_2/m ) : C m c a |
| 8.BE.65 | Sabelliite | (Cu,Zn)2Zn(AsO4,SbO4)(OH)3 | Trig. 3 : _P_3 |
| 8.BE.70 | Jarosewichite | Mn2+3Mn3+(AsO4)(OH)6 | Orth. 222 |
| 8.BE.75 | Theisite | Cu5Zn5(AsO4,SbO4)2(OH)14 | Orth. |
| 8.BE.80 | Coparsite | Cu4(AsO4,VO4)O2Cl | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c m |
| 8.BE.85 | Waterhouseite | Mn2+7(PO4)2(OH)8 | Mon. 2/m : _P_21/b |
| 8.BE.90 | Vasilseverginite | Cu9O4(AsO4)2(SO4)2 | Mon. 2/m |
Fluorescence of ArganditeHide
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Other InformationHide
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Notes:
Slowly soluble in cold 10% HCl.
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 ArganditeHide
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References for ArganditeHide
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Reference List:
Brugger, J., Elliott, P., Meisser, N., Ansermet, S. (2011) Argandite, Mn7(VO4)2(OH)8, the V analogue of allactite from the metamorphosed Mn ores at Pipji, Turtmann Valley, Switzerland. American Mineralogist, 96 (11) 1894-1900 doi:10.2138/am.2011.3841
Localities for ArganditeHide
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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
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- 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.
| Italy | |
|---|---|
| Liguria Genoa Ne Reppia ⓘ Gambatesa Mine |
SCXRD: L. Bindi - University of Firenze ... +1 other reference |
| Switzerland (TL) | |
| Valais Leuk Turtmann-Unterems Turtmann Valley ⓘ Pipjitälli (TL) | Williams et al. (2010) +1 other reference |
| ⓘ Pipji glacier | Ansermet (2012) |