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Reppiaite

A valid IMA mineral species
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01639780014952984795468.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
07141740014971011624761.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
08956680014971011625589.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
09529940014947632156003.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
04956460014947632162877.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
08082790014962575113603.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
01639780014952984795468.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
07141740014971011624761.jpg
Reppiaite

Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
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About ReppiaiteHide

06069070017057165992086.jpg
Reppia, Genoa, Liguria, Italy
Formula:
Mn2+5(VO4)2(OH)4
Colour:
Orange-red
Lustre:
Vitreous
Hardness:
3 - 3½
Specific Gravity:
3.92
Crystal System:
Monoclinic
Name:
Named after the village of Reppia, Italy, near the type locality.
Related to arsenoclasite.


Unique IdentifiersHide

Mindat ID:
3390
Long-form identifier:
mindat:1:1:3390:5
GUID
(UUID V4):
51678c5f-8270-4a75-b27e-34e4e76060e1

IMA Classification of ReppiaiteHide

Classification of ReppiaiteHide

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

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
Dana 8th ed.:
41.4.8.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq

Mineral SymbolsHide

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

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

Physical Properties of ReppiaiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Orange-red
Streak:
Yellow-red
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN15=90 - 110 kg/mm2 - Vickers
Density:
3.92 g/cm3 (Measured)    3.91 g/cm3 (Calculated)

Optical Data of ReppiaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.803(2) nγ = 1.810(5)
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Pleochroism:
Weak
Comments:
yellow-orange to deep orange.

Chemistry of ReppiaiteHide

Mindat Formula:
Mn2+5(VO4)2(OH)4
Elements listed:
H, Mn, O, V - search for minerals with similar chemistry
Common Impurities:
As

Crystallography of ReppiaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.614(4) Å, b = 9.561(3) Å, c = 5.396(3) Å
β = 98.39(1)°
Ratio:
a:b:c = 1.006 : 1 : 0.564
Unit Cell V:
490.69 ų (Calculated from Unit Cell)
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006613ReppiaiteBarbier J (1996) Crystal structure of Ni5(AsO4)2(OH)4 and its comparison to other M5(XO4)2(OH)4 compounds European Journal of Mineralogy 8 77-8419960293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.680 Å(VS)
4.76 Å(S)
3.00 Å(M)
2.656 Å(M)
2.155 Å(M)
1.565 Å(M)
1.510 Å(M)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47e : [Vanadates, chromates, manganates]

Type Occurrence of ReppiaiteHide

Type Locality:
ⓘ Gambatesa Mine, Reppia, Ne, Genoa, Liguria, Italy
General Appearance of Type Material:
Minute tabular crystals, flattened on {100}, with and irregular contour. The crystals are at most 50 µm thick and 300 µm in diameter. Under a polarizing microscope, the crystals commonly appear as fine-grained aggregates, with size of individual grains under 10 µm.
Place of Conservation of Type Material:
University of Genoa, Genoa, Italy.
Geological Setting of Type Material:
Fractures cutting manganese-bearing cherts.
Associated Minerals at Type Locality:
TephroiteHausmannite
Reference:
Basso, R.; Lucchetti, G.; Zefiro, L.; Palenzona, A. (1992): Reppiaite, Mn5(OH)4(VO4)2, a new mineral from Val Graveglia (Northern Apennines, Italy). Zeitschrift für Kristallographie: 201, 223-234.

Synonyms of ReppiaiteHide

Other Language Names for ReppiaiteHide

German:Reppiait
Spanish:Reppiaita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Reppiaite associated with KutnohoriteCaMn2+(CO3)2
1 photo of Reppiaite associated with SussexiteMn2+BO2(OH)

Related Minerals - Strunz-mindat GroupingHide

8.BD.AntipoviteCu5O2(PO4)2Tric. 1 : P1
8.BD.05CornwalliteCu5(AsO4)2(OH)4Mon. 2/m : P21/b
8.BD.05PseudomalachiteCu5(PO4)2(OH)4Mon. 2/m : P21/b
8.BD.05ReichenbachiteCu5(PO4)2(OH)4Mon. 2/m
8.BD.10ArsenoclasiteMn2+5(AsO4)2(OH)4Orth. 2 2 2 : P21 21 21
8.BD.10GatehouseiteMn2+5(PO4)2(OH)4Orth. 2 2 2 : P21 21 21
8.BD.15ParweliteMn10Sb2As2Si2O24Mon. m : Bb
8.BD.25LudjibaiteCu5(PO4)2(OH)4Tric. 1 : P1
8.BD.30CornubiteCu5(AsO4)2(OH)4Tric. 1 : P1

Fluorescence of ReppiaiteHide

In UV light:
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 ReppiaiteHide

References for ReppiaiteHide

Localities for ReppiaiteHide

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 (TL)
 
  • Liguria
    • Genoa
      • Ne
        • Reppia
Basso +5 other references
        • Statale
//doi.org/10.57635/MICRO.2023.21.7
Switzerland
 
  • Valais
    • Leuk
      • Turtmann-Unterems
        • Turtmann Valley
          • Pipjitälli
Stalder et al. (1998) +1 other reference
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