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Coralloite

A valid IMA mineral species
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01611910014952097975460.jpg
Coralloite

Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
07314110017062446844269.jpg
Coralloite

Falotta, Tinizong, Surses, Albula Region, Grisons, Switzerland
09846960017128743771292.jpg
Coralloite

Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
08091880014946719071880.jpg
Coralloite

Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
01489550017061699774047.jpg
Coralloite

Falotta, Tinizong, Surses, Albula Region, Grisons, Switzerland
09268910017071291185339.jpg
Coralloite

Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
01611910014952097975460.jpg
Coralloite

Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
07994440017062540406918.jpg
Coralloite

Falotta, Tinizong, Surses, Albula Region, Grisons, Switzerland
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About CoralloiteHide

Formula:
Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O
Colour:
Cinnabar-red
Lustre:
Vitreous
Specific Gravity:
3.26 (Calculated)
Crystal System:
Triclinic
Name:
Named in honor of Giorgio Corallo (13 August 1937, Genoa, Italy - ), an Italian amateur mineral collector, who first found several new minerals in Liguria, including cassagnaite, gravegliaite, and reppiaite.
Structurally related to the Arthurite Group, bermanite (chemically the phosphate analogue of coralloite) and ercitite.


Unique IdentifiersHide

Mindat ID:
40140
Long-form identifier:
mindat:1:1:40140:9
GUID
(UUID V4):
1752dc0a-a934-4f56-a980-c91bf157db70

IMA Classification of CoralloiteHide

Classification of CoralloiteHide

Strunz-mindat (2024):
8.DC.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
Dana 8th ed.:
42.11.19.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O

Mineral SymbolsHide

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

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

Physical Properties of CoralloiteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Cinnabar-red
Hardness Data:
Could not be measured
Density:
3.26 g/cm3 (Calculated)
Comment:
Could not be measured

Chemistry of CoralloiteHide

Mindat Formula:
Mn2+Mn3+2(AsO4)2(OH)2 · 4H2O
Elements listed:
As, H, Mn, O - search for minerals with similar chemistry

Crystallography of CoralloiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 5.5828(7) Å, b = 9.7660(13) Å, c = 5.5455(7) Å
α = 94.467(3)°, β = 111.348(2)°, γ = 93.85(2)°
Ratio:
a:b:c = 0.572 : 1 : 0.568
Unit Cell V:
279.26 ų
Z:
1
Morphology:
Elongated on [100] and flattened on (001).

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018861CoralloiteCallegari A M, Boiocchi M, Ciriotti M E, Balestra C (2012) Coralloite, Mn2+Mn3+2(AsO4)2(OH)2*4H2O, a new mixed valence Mn hydrate arsenate: crystal structure and relationships with bermanite and whitmoreite mineral groups American Mineralogist 97 727-7342012Monte Nero mine, Rocchetta Vara, La Spezia, Liguria, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.710 Å(100)
5.166 Å(77)
5.136 Å(80)
3.342 Å(65)
3.324 Å(34)
2.873 Å(22)
2.631 Å(23)
2.565 Å(22)

Geological EnvironmentHide

Type Occurrence of CoralloiteHide

Type Locality:
ⓘ Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
General Appearance of Type Material:
Sub-millimetric lamellar cinnabar-red crystals , isolated or forming wisps up to 0.5–1 mm long.
Place of Conservation of Type Material:
Museo di Mineralogia, Dipartimento di Scienze della Terra, Università degli Studi di Pavia, Italy, catalog number 2010-001.
Geological Setting of Type Material:
Manganese deposit in metachert.
Associated Minerals at Type Locality:
TilasiteSarkiniteQuartzInesiteCalcite
Brandtite
Reference:
Callegari, A.M., Boiocchi, M., Ciriotti, M.E., Balestra, C. (2012) Coralloite, Mn2+Mn3+2(AsO4)2(OH)2•4H2O, a new mixed valence Mn hydrate arsenate: Crystal structure and relationships with bermanite and whitmoreite mineral groups. American Mineralogist, 97, 727-734.
Download:
https://rruff.info/rruff_1.0/uploads/AM97_727.pdf

Synonyms of CoralloiteHide

Relationship of Coralloite to other SpeciesHide

Structurally related to group(s):
Arthurite GroupM2+M3+2(TO4)2(OH)2 · 4H2O

Related Minerals - Strunz-mindat GroupingHide

8.DC.IanbruceiteZn2(AsO4)(OH) · 3H2OMon. 2/m : P21/b
8.DC.CésarferreiraiteFe2+ Fe3+2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.FerrivauxiteFe3+Al2(PO4)2(OH)3 · 5H2OTric. 1 : P1
8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon. 2/m : B2/b
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 2 2 2 : P21 21 21
8.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15Cobaltarthurite(Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15UM2006-27-PO:FeHZnZnFe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
8.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
8.DC.20MagnesiobermaniteMgMn3+2(PO4)2(OH)2 · 4H2OMon. 2 : P21
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon. 2/m : P21/b
8.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.
8.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25ZincostrunziteZnFe3+2(PO4)2(OH)2 · 6.5H2OTric. 1 : P1
8.DC.27BerauniteFe3+6(PO4)4O(OH)4 · 6H2OMon. m : Bb
8.DC.27TvrdýiteFe2+Fe3+2 Al3(PO4)4(OH)5(H2O)4 · 2H2OMon. 2/m : B2/b
8.DC.27ZincoberauniteZnFe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30PseudolaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2OTric. 1 : P1
8.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2OTric. 1 : P1
8.DC.30Kayrobertsonite[MnAl2(PO4)2(OH)2(H2O)4] · 2H2OTric. 1 : P1
8.DC.30KummeriteMn2+Fe3+Al(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.32TinticiteFe3+3(PO4)2(OH)3 · 3H2OTric. 1 : P1
8.DC.32KamarizaiteFe3+3(AsO4)2(OH)3 · 3H2OTric. 1 : P1
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric. 1
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2OOrth. mmm (2/m 2/m 2/m)
8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m : P21/m
8.DC.50FluorwavelliteAl3(PO4)2(OH)2F · 5H2OOrth. mmm (2/m 2/m 2/m)
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
8.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon. m : Bm
8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth. mmm (2/m 2/m 2/m)
8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m : P21/b
8.DC.62KenngottiteMn2+3Fe3+4(PO4)4(OH)6(H2O)2 Mon. 2/m : P2/b
8.DC.67MolinelloiteCu(H2O)(OH)V4+O(V5+O4)Tric. 1 : P1
8.DC.70WhitecapsiteH16Fe2+5Fe3+14Sb3+6(AsO4)18O16 · 120H2OHex. 6/m : P63/m
8.DC.75HeimitePbCu2(AsO4)(OH)3 · 2H2OMon. 2/m
8.DC.80LedneviteCu[PO3(OH)] · H2OMon. 2/m : P21/b

Fluorescence of CoralloiteHide

In UV light:
Note 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 CoralloiteHide

References for CoralloiteHide

Localities for CoralloiteHide

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.
Italy
 
  • Liguria
    • Genoa
      • Ne
Castellaro et al. (2021)
    • La Spezia Province
      • Rocchetta di Vara
Williams et al. (2010) +2 other references
  • Piedmont
    • Cuneo Province
      • Canosio
        • Vallone della Valletta
Cámara et al. (2017)
Switzerland
 
  • Grisons
    • Albula Region
      • Surses
        • Tinizong (Tinzen)
homepage.swissonline.ch (n.d.)
    • Viamala Region
      • Rheinwald
        • Splügen
Found by Franco Vanini +1 other reference
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