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Villyaellenite

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About VillyaelleniteHide

09150410015789549973482.jpg
Villy Aellen
Formula:
MnMn2Ca2(AsO4)2(HAsO4)2 · 4H2O
Colour:
Colorless, orange to light pink
Lustre:
Sub-Vitreous, Resinous
Hardness:
4
Specific Gravity:
3.20
Crystal System:
Monoclinic
Name:
Named by H. Sarp in 1984 after Villy Aellen, (1926, Neuchâtel, Switzerland - 2000), zoologist and former Director of the Natural History Museum of Geneva (Switzerland).
Isostructural with:
Compare giftgrubeite, the ordered (Ca:Mn = 3:2) intermediate member between villyaellenite and sainfeldite.

See also the closely related miguelromeroite. Note: The miguelromeroite samples from the Veta Negra mine, Chile, were originally labeled "villyaellenite".




Classification of VillyaelleniteHide

Approved
Approval year:
1983
First published:
1984
8.CB.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
39.2.1.3

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O
20.8.20

20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn

Physical Properties of VillyaelleniteHide

Sub-Vitreous, Resinous
Transparency:
Transparent, Translucent
Colour:
Colorless, orange to light pink
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
{100} good
Density:
3.20 g/cm3 (Measured)    3.24 g/cm3 (Calculated)
Comment:
D as high as 3.72, Am Min (1988): 73:1172

Optical Data of VillyaelleniteHide

Type:
Biaxial (-)
RI values:
nα = 1.660 - 1.713 nβ = 1.670 - 1.723 nγ = 1.676 - 1.729
2V:
Measured: 70.5° to 76°, Calculated: 75° to 75.6°
Birefringence:
0.016
Max Birefringence:
δ = 0.016
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak
Optical Extinction:
Y ^ c = 30°-40°.
Pleochroism:
Visible
Comments:
X=very pale orange pink, Y=exceedingly pale pink, Z=pale orange pink; Z>>X>Y.
Comments:
Higher optics may represent closeness to end-member.

Chemical Properties of VillyaelleniteHide

Formula:
MnMn2Ca2(AsO4)2(HAsO4)2 · 4H2O
IMA Formula:
(Mn,Ca)Mn2Ca2(AsO3OH)2(AsO4)2 · 4H2O
Common Impurities:
Zn,Ca,Fe

Crystallography of VillyaelleniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 18.55 Å, b = 9.50 Å, c = 9.99 Å
β = 96.94°
Ratio:
a:b:c = 1.953 : 1 : 1.052
Unit Cell V:
1,747.59 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Rosettes of prismatic crystals, elongated || [001], tabular || {100}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.21 Å(50)
4.45 Å(30)
3.24 Å(50)
3.21 Å(100)
3.13 Å(30)
3.06 Å(70)
2.98 Å(40)
2.34 Å(30)
Comments:
ICDD 41-1455, also 37-444.

Type Occurrence of VillyaelleniteHide

Associated Minerals at Type Locality:
Reference:
Sarp, H. (1984) Villyaellenite, H2(Mn,Ca)5(AsO4)4·4H2O un nouveau minéral de Saint-Marie aux Mines (France). Schweizerische Mineralogische und Petrographische Mitteilungen: 64: 323-328.

Synonyms of VillyaelleniteHide

Other Language Names for VillyaelleniteHide

Relationship of Villyaellenite to other SpeciesHide

Other Members of this group:
ChongiteCa3Mg2(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
GiftgrubeiteCaMn2Ca2(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
HureauliteMn2+5(PO3OH)2(PO4)2 · 4H2OMon. 2/m : B2/b
MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Villyaellenite associated with SideriteFeCO3
1 photo of Villyaellenite associated with ArsenicAs

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10HureauliteMn2+5(PO3OH)2(PO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.25YvoniteCu(HAsO4) · 2H2OTric.
8.CB.30GeminiteCu2+(AsO3OH) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(H2O)4[AsO3(OH)]2(H2O)Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

39.2.1.1HureauliteMn2+5(PO3OH)2(PO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.2SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
39.2.1.4UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
39.2.1.4MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.6NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.8.1SarkiniteMn2+2(AsO4)(OH)Mon. 2/m : P21/b
20.8.2EveiteMn2+2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
20.8.3ArsenoclasiteMn2+5(AsO4)2(OH)4Orth.
20.8.4FlinkiteMn2+2Mn3+(AsO4)(OH)4Orth. mmm (2/m 2/m 2/m)
20.8.5JarosewichiteMn2+3Mn3+(AsO4)(OH)6Orth. 2 2 2
20.8.6AllactiteMn2+7(AsO4)2(OH)8Mon. 2/m : P21/b
20.8.7KrautiteMn(HAsO4) · H2OMon. 2 : P21
20.8.8SynadelphiteMn2+9(As5+O4)2(As3+O3)(OH)9 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnma
20.8.9SterlinghilliteMn2+3(AsO4)2 · 3H2OTric. 1 : P1
20.8.10GeigeriteMn2+5(AsO4)2(HAsO4)2 · 10H2OTric.
20.8.11Akrochordite(Mn2+,Mg)5(AsO4)2(OH)4 · 4H2OMon. 2/m : P21/b
20.8.12ManganohörnesiteMn2+3(AsO4)2 · 8H2OMon. 2/m : P2/m
20.8.13FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
20.8.14BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
20.8.15ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric.
20.8.16WallkilldelliteCa2Mn2+3(AsO4)2(OH)4 · 9H2OHex.
20.8.17Berzeliite(NaCa2)Mg2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
20.8.18Manganberzeliite(NaCa2)Mn2+2(AsO4)3Iso. m3m (4/m 3 2/m) : Ia3d
20.8.19Magnesiochlorophoenicite(Mg,Mn)3Zn2(AsO4)(OH,O)6Mon. 2/m : B2/m
20.8.21Hematolite(Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23Trig. 3 : R3
20.8.22GrischuniteNaCa2Mn2+5Fe3+(AsO4)6 · 2H2OOrth.

Fluorescence of VillyaelleniteHide

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.

References for VillyaelleniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sarp, H. (1984) Villyaellenite, H2(Mn,Ca)5(AsO4)4·4H2O un nouveau minéral de Saint-Marie aux Mines (France). Schweizerische Mineralogische und Petrographische Mitteilungen: 64: 323-328.
Hawthorne, F.C., Bladh, K.W., Burke, E.A.J., Ercit, S., Grew, E.S., Grice, J.D., Puziewicz, J., Roberts, A.C., Schedler, R.A., Shigley, J.E. (1986) New mineral names. American Mineralogist: 71: 1543-1548.
Kampf, A.R., Ross, C.R. II (1988) End-member villyaellenite from Mapimi, Durango, Mexico: descriptive mineralogy, crystal structure, and implications for the ordering of Mn and Ca in type villyaellenite. American Mineralogist: 73: 1172-1178.
Roth, P. (2007) Villyaellenite. in Minerals first discovered in Switzerland and minerals named after Swiss individuals. Kristallografik Verlag (Achberg Germany) 202-203.
Kampf, A.R. (2009) Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist: 94: 1535-1540.

Internet Links for VillyaelleniteHide

Localities for VillyaelleniteHide

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 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.
Chile
 
  • Atacama
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga mining district
Kampf, A. R. (2009). Miguelromeroite, the Mn analogue of sainfeldite, and redefinition of villyaellenite as an ordered intermediate in the sainfeldite-miguelromeroite series. American Mineralogist, 94(11-12), 1535-1540.
Czech Republic
 
  • Karlovy Vary Region
    • Karlovy Vary District
Lapis 2002(7/8), 63-65
France (TL)
 
  • Grand Est
    • Haut-Rhin
      • Colmar-Ribeauvillé
Sarp (1984); Am.Min.: 71 (1986): 1547 (abst.); 73 (1988):1172.
P&T N°23-24, H. BARI 1982, Minéralogie des filons du Neuenberg à Sainte Marie aux Mines (Haut-Rhin).
            • Sankt Jakob vein
Bari, H. (1982) Minéralogie des filons du Neuenberg à Sainte Marie-aux-Mines (Haut-Rhin). Pierres et Terre: 23-24.
Italy
 
  • Piedmont
    • Metropolitan City of Turin
      • Borgofranco d'Ivrea
        • Biò
Campostrini, I., Demartin, F., Martini, B., Salvetti, A., Dalla Fontana, G., Boscardin, M., Ambrino, P., Ciriotti, M.E. (2014): Villyaellenite dalle gallerie inferiori di Biò, Borgofranco d’Ivrea (Torino), Piemonte. GMT 2014 Giornate Mineralogiche di Tavagnasco, 6-8 giugno 2014. Plinius, 40, 170.
Japan
 
  • Fukushima Prefecture
    • Iwaki City
Matsubara, S., Kato, A., Shimizu, M., Sekiuchi, K., and Suzuki, M. (1996) Romeite from the Gozaisho mine, Iwaki, Japan. Mineralogical Journal 18, 155-160.
Mexico
 
  • Durango
    • Mapimí Municipality
      • Mapimí
Mineralogical Record (2003) 34:5 The Ojuela Mine; American Mineralogist, Volume 73, pages 1172-1 178, 1988
Thomas P. Moore (2008) Lapis, 33, #7-8, 33-40.
Romania
 
  • Hunedoara
    • Deva
Ghergari, L., Forray, F., Gál, Á., Fărcaş, T. (1994) Studia Universitatis Babeş-Bolyai, Geologia: 39(1): 127-140.
USA
 
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Kampf, A.R. & Ross, C.R., II: Am.Min.:73:1172-1178 (1988); Dunn(1995):Pt5:684.
 
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