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Minasragrite

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Ragra Mine (Minasragra), Huayllay district, Pasco province, Pasco department, Peru
© Vincent Bourgoin

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Formula:
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
System:MonoclinicColour:Blue; blue in ...
Lustre:VitreousHardness:1 - 2
Member of:Minasragrite Group
Name:After the type locality, Minasragra, near Cerro de Pasco, Peru.
This page provides mineralogical data about Minasragrite.

Classification of Minasragrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/D.05-10
Nickel-Strunz 10th (pending) edition ID:7.DB.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
B : With only medium-sized cations; insular octahedra and finite units
Dana 8th edition ID:29.6.12.1

29 : HYDRATED ACID AND NORMAL SULFATES
6 : AXO4·xH2O
Hey's CIM Ref.:25.8.5

25 : Sulphates
8 : Sulphates of Sb, V, Cr and U
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Type Occurrence of Minasragrite

Type Locality:Ragra Mine (Minasragra), Huayllay district, Pasco province, Pasco department, Peru
General Appearance of Type Material:Efflorescences on patronite.
Year of Discovery:1915
Associated Minerals at type locality:
Patrónite

Physical Properties of Minasragrite

Lustre:Vitreous
Colour:Blue; blue in transmitted light
Hardness (Mohs):1 - 2
Cleavage:None Observed

Crystallography of Minasragrite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 12.94Å, b = 9.74Å, c = 7Å
β = 110.93°
Ratio:a:b:c = 1.329 : 1 : 0.719
Unit Cell Volume:V 824.04 ų (Calculated from Unit Cell)
Morphology:Minute crystals forming efflorescences; granular aggregates; small mammillary masses; spherulites.

Optical Data of Minasragrite

Type:Biaxial (-)
RI values: nα = 1.513 nβ = 1.536 nγ = 1.545
Maximum Birefringence:δ = 0.032

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:strong
Pleochroism:Visible
Comments:X = Deep blue
Y = Blue
Z = Colourless

Chemical Properties of Minasragrite

Formula:
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
Essential elements:H, O, S, V
All elements listed in formula:H, O, S, V
Analytical Data:Readily soluble in cold water.
Relationship of Minasragrite to other Species
Member of:Minasragrite Group
Other Members of Group:

- + 
Anorthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
Orthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- + 
7.DB.05Aubertite
CuAl(SO
 
4
)
 
2
Cl · 14H
 
2
O
7.DB.05Magnesioaubertite
(Mg,Cu)Al(SO
 
4
)
 
2
Cl · 14H
 
2
O
7.DB.05Svyazhinite
(Mg,Mn
2+
 
,Ca)(Al,Fe
3+
 
)(SO
 
4
)
 
2
F · 14H
 
2
O
7.DB.10Khademite
Al(SO
 
4
)F · 5H
 
2
O
7.DB.10Rostite
Al(SO
 
4
)(OH) · 5H
 
2
O
7.DB.15Jurbanite
Al(SO
 
4
)(OH) · 5H
 
2
O
7.DB.20Orthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
7.DB.20Anorthominasragrite
(V
4+
 
O)(SO
 
4
) · 5H
 
2
O
7.DB.25Bobjonesite
(V
4+
 
O)(SO
 
4
) · 3H
 
2
O
7.DB.30Amarantite
Fe
3+
2
(SO
 
4
)
 
2
O · 7H
 
2
O
7.DB.30Hohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 8H
 
2
O
7.DB.30Metahohmannite
Fe
3+
2
(SO
 
4
)
 
2
O · 4H
 
2
O
7.DB.35Aluminocopiapite
Al
 
2/3
Fe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Calciocopiapite
CaFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
 · 10H
 
2
O
7.DB.35Copiapite
Fe
2+
 
Fe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Cuprocopiapite
CuFe
 
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Ferricopiapite
Fe
 
5
(SO
 
4
)
 
6
O(OH) · 20H
 
2
O
7.DB.35Magnesiocopiapite
MgFe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 20H
 
2
O
7.DB.35Zincocopiapite
ZnFe
3+
4
(SO
 
4
)
 
6
(OH)
 
2
 · 18H
 
2
O
Related Minerals - Hey's Index Grouping:

- + 
25.8.1Klebelsbergite
(SbO)
 
4
(SO
 
4
)(OH)
 
2
25.8.2Coquandite
(SbO)
 
6
(SO
 
4
)O
 
2
 · H
 
2
O
25.8.3Peretaite
Ca(SbO)
 
4
(SO
 
4
)
 
2
(OH)
 
2
 · 2H
 
2
O
25.8.4Cannonite
Bi
 
2
(SO
 
4
)O(OH)
 
2
25.8.6Stanleyite
(V
4+
 
O)(SO
 
4
) · 6H
 
2
O
25.8.7Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
25.8.8Meta-uranopilite
(UO
 
2
)
 
6
(SO
 
4
)(OH)
 
10
 · 5H
 
2
O
25.8.9Uranopilite
(UO
 
2
)
 
6
(SO
 
4
)O
 
2
(OH)
 
6
 · 14H
 
2
O
25.8.10Natrozippeite
Na
 
4
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
 · 4H
 
2
O
25.8.11Zippeite
K
 
4
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
 · 4H
 
2
O
25.8.12Johannite
Cu(UO
 
2
)
 
2
(SO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
25.8.13Magnesiozippeite
Mg(UO
 
2
)
 
2
(SO
 
4
)(OH)
 
4
 · 1.5H
 
2
O
25.8.14Zinczippeite
Zn
 
2
(UO
 
2
)
 
6
(SO
 
4
)
 
3
(OH)
 
10
 · 16H
 
2
O
Other Names for Minasragrite
Other Languages:
German:Minasragrit
Russian:Минасрагрит
Spanish:Minasragrita
Other Information
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Minasragrite
Reference List:

- + 
Schaller (1915) Journal of the Washington Academy of Sciences: 5: 7.



Schaller (1917) Journal of the Washington Academy of Sciences: 7: 501.



Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 110.



Palache, Charles (1934), Contributions to crystallography; claudetite, minasragrite, samsonite, native selenium, indium: American Mineralogist: 19: 194-205; …(abstract): American Mineralogist: 19: 128 (1934).



Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 437-438.



American Mineralogist (1973): 58: 531-534.



Acta Crystallographica (1979): B35: 1545-1550.


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    • Localities for Minasragrite
    






    


    

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    (TL) indicates type locality.  ? 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.

    Peru
     
    

    • Pasco department
    

      • Pasco province
    

        • Huayllay district
    
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 438, 498; Washington Academy of Science (1915): 5: 7.
    USA
     
    

    • Utah
    

      • Emery Co.
    

        • San Rafael District (San Rafael Swell)
    
    		Can. Min. 39:1325-1331
    

    


    

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