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Reppiaite

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About ReppiaiteHide

Formula:
Mn2+5(VO4)2(OH)4
Colour:
Orange-red
Lustre:
Vitreous
Hardness:
3 - 3½
Crystal System:
Monoclinic
Name:
Named after its discovery locality.
Related to arsenoclasite.


Classification of ReppiaiteHide

Approved
Approval Year:
1991
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
41.4.8.1

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

Physical Properties of ReppiaiteHide

Vitreous
Transparency:
Transparent
Colour:
Orange-red
Streak:
Orange-red
Hardness:
3 - 3½ on Mohs scale

Optical Data of ReppiaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.803 nγ = 1.810
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

Chemical Properties of ReppiaiteHide

Formula:
Mn2+5(VO4)2(OH)4
Common Impurities:
As

Crystallography of ReppiaiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 9.6 Å, b = 9.55 Å, c = 5.39 Å
β = 98.45°
Ratio:
a:b:c = 1.005 : 1 : 0.564
Unit Cell V:
488.79 ų (Calculated from Unit Cell)

Type Occurrence of ReppiaiteHide

Synonyms of ReppiaiteHide

Other Language Names for ReppiaiteHide

German:Reppiait
Spanish:Reppiaita

Related Minerals - Nickel-Strunz GroupingHide

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.
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

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.

References for ReppiaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
New Minerals (1997), New Minerals 1990-1994.

Internet Links for ReppiaiteHide

Localities for ReppiaiteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
          • Reppia
            • Monte Copello
[Zeits.Kristallogr.(1992) 201, 223-234; MinRec 32:354]
Switzerland
 
  • Wallis (Valais)
    • Turtmann Valley
      • Pipjitälli
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 266-267, 347.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
Mineral and/or Locality  
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