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Reppiaite

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Formula:
Mn52+(VO4)2(OH)4
System:
Monoclinic
Colour:
Orange-red
Hardness:
3 - 3½
Name:
Named after its discovery locality.
Related to arsenoclasite.

Classification of Reppiaite

Approved 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
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First Recorded Occurrence of Reppiaite

Year of Discovery:
1991

Physical Properties of Reppiaite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Orange-red
Streak:
Orange-red
Hardness (Mohs):
3 - 3½

Crystallography of Reppiaite

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

Optical Data of Reppiaite

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 Reppiaite

Formula:
Mn52+(VO4)2(OH)4
Essential elements:
All elements listed in formula:
Common Impurities:
As

Relationship of Reppiaite to other Species

8.BD.05CornwalliteCu5(AsO4)2(OH)4
8.BD.05PseudomalachiteCu5(PO4)2(OH)4
8.BD.05ReichenbachiteCu5(PO4)2(OH)4
8.BD.10ArsenoclasiteMn52+(AsO4)2(OH)4
8.BD.10GatehouseiteMn52+(PO4)2(OH)4
8.BD.15ParweliteMn10Sb2As2Si2O24
8.BD.25LudjibaiteCu5(PO4)2(OH)4
8.BD.30CornubiteCu5(AsO4)2(OH)4

Other Names for Reppiaite

Name in Other Languages:
German:Reppiait
Spanish:Reppiaita

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.

References for Reppiaite

Reference List:
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 Reppiaite

Localities for Reppiaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
          • Reppia
[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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