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Paramendozavilite

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Formula:
NaAl4Fe7(PO4)5(PMo12O40)(OH)16 · 56H2O
System:
Monoclinic
Colour:
Pale yellow
Hardness:
1
Name:
First described by Williams (1986) from San Judas Mine, Cumobabi, Moctezuma, Sonora, Mexico. Named for the close relation to mendozavilite.
This page provides mineralogical data about Paramendozavilite.

Classification of Paramendozavilite

Approved
7.GB.45

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O
49.4.6.1

49 : HYDRATED MOLYBDATES AND TUNGSTATES
4 : Compound Molybdates and Tungstates
22.5.7

22 : Phosphates, Arsenates or Vanadates with other Anions
5 : Phosphates, arsenates or vanadates with chromate, molybdate, niobate or tantalate
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Type Occurrence of Paramendozavilite

Physical Properties of Paramendozavilite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Pale yellow
Streak:
Very pale yellow
Hardness (Mohs):
1
Cleavage:
Perfect
one perfect cleavage
Density:
3.35 g/cm3 (Measured)    2.858 g/cm3 (Calculated)

Crystallography of Paramendozavilite

Crystal System:
Monoclinic
Cell Parameters:
a = 10.963(2) Å, b = 25.881(3) Å, c = 15.434(2) Å
β = 110.73(1)°
Ratio:
a:b:c = 0.424 : 1 : 0.596
Unit Cell Volume:
V 4095.8 ų
Twinning:
Crystals are mostly twinned

Optical Data of Paramendozavilite

Type:
Biaxial (-)
RI values:
nα = 1.686 nβ = 1.710 nγ = 1.720
2V:
Measured: 60° , Calculated: 64.9°
Max Birefringence:
δ = 0.034
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v
Pleochroism:
Visible
Comments:
Pale yellow, Z > Y > X

Chemical Properties of Paramendozavilite

Formula:
NaAl4Fe7(PO4)5(PMo12O40)(OH)16 · 56H2O
All elements listed in formula:
Analytical Data:
Empirical formula from Kampf et al.(2012).
Empirical Formula:
[(K0.54Mg0.12Ca0.10Na0.090.85(Al3.83Ti0.133.96(H2O)30.15][Mo12P5.58(Fe3+5.89Al0.116.00O57.99(OH)14.85Cl0.16]

Relationship of Paramendozavilite to other Species

7.GB.05LindgreniteCu3(MoO4)2(OH)2
7.GB.10SzenicsiteCu3(MoO4)(OH)4
7.GB.15CuprotungstiteCu2(WO4)(OH)2
7.GB.15UM1999-38-WO:CrV(V, Cr, W, O, H) [V:Cr:W ratio about 2:1:3]
7.GB.20Phyllotungstite(H2O,M)x(W,Fe)(O,OH)3 · yH2O (M = Ca, Cs, Pb or K)
7.GB.25RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O
7.GB.30FerrimolybditeFe2(MoO4)3 · nH2O
7.GB.35AnthoiniteAlWO3(OH)3
7.GB.35MpororoiteWAlO3(OH)3 · 2(H2O)
7.GB.40Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe33+O34(OH)3]
7.GB.45Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe33+O35(OH)2]
7.GB.50Tancaite-(Ce)FeCe(MoO4)3·3H2O
22.5.1VauquelinitePb2Cu(CrO4)(PO4)(OH)
22.5.2EmbreyitePb5(CrO4)2(PO4)2 · H2O
22.5.3CassedanneitePb5(CrO4)2(VO4)2 · H2O
22.5.4FornacitePb2Cu(CrO4)(AsO4)(OH)
22.5.5MolybdofornacitePb2Cu(MoO4,CrO4)(AsO4,PO4)(OH)
22.5.6Mendozavilite-NaFe[Na2(H2O)15Fe3+(H2O)6][Mo8P2Fe33+O35(OH)2]
22.5.8Betpakdalite-CaCa[Ca2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O36(OH)]
22.5.9Betpakdalite-NaCa[Na2(H2O)17Ca(H2O)6][Mo86+As25+Fe33+O34(OH)3]
22.5.10Obradovicite-KCu[K2(H2O)17Cu(H2O)6][Mo8As2Fe33+O34(OH)3]
22.5.11Melkovite[Ca2(H2O)15Ca(H2O)6][Mo8P2Fe33+O36(OH)]
22.5.12RankachiteCa0.5(V4+,V5+)(W6+,Fe3+)2O8(OH) · 2H2O
22.5.13OlmsteaditeKFe22+(Nb5+,Ta5+)(PO4)2O2 · 2H2O
22.5.14JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)

Other Names for Paramendozavilite

Name in Other Languages:

Other Information

Other Information:
Easily soluble in dilute acids
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 Paramendozavilite

Reference List:
Williams S A (1986) Mendozavilite and paramendozavilite, two new minerals from Cumobabi, Sonora. Boletín de Mineralogía: 2: 13-19

Hawthorne F C, Burke E A J, Ercit T S, Grew E S, Grice J D, Jambor J L, Puziewicz J, Roberts A C, Vanko D A (1988) New mineral names. American Mineralogist 73, 189-199 [abstract]

Kampf, A.R., Mills, S.J., Rumsey, M.S., Dini, M., Birch, W.D., Spratt, J., Pluth, J.J., Steele, I.M., Jenkins, R.A., Pinch, W.W. (2012): The heteropolymolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine: 76: 1175-1207

Internet Links for Paramendozavilite

Specimens:
The following Paramendozavilite specimens are currently listed for sale on minfind.com.

Localities for Paramendozavilite

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.
Mexico
 
  • Sonora
    • Mun. de Moctezuma
      • La Verde District
Williams S A (1986) Mendozavilite and paramendozavilite, two new minerals from Cumobabi, Sonora. Boletín de Mineralogía: 2: 13-19
Williams S A (1986) Mendozavilite and paramendozavilite, two new minerals from Cumobabi, Sonora. Boletín de Mineralogía: 2: 13-19; Kampf, A.R., Mills, S.J., Rumsey, M.S., Dini, M., Birch, W.D., Spratt, J., Pluth, J.J., Steele, I.M., Jenkins, R.A., Pinch, W.W. (2012): The heteropolymolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine: 76: 1175-1207
USA
 
  • Utah
    • Tooele Co.
      • Deep Creek Mts
        • Gold Hill District (Clifton District)
Mineral and/or Locality  
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