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Ransomite

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United Verde Mine (The Big Hole; Big Hole property; Hull Mine; Hopewell tunnel; Patented claim 3480; Patented claim 2812; Patented claims 3348), Jerome, Verde District, Black Hills (Black Hill Range), Yavapai Co., Arizona, USA
© Thomas Witzke

Show Ransomite Photos (3)
Formula:
CuFe
 
2
(SO
 
4
)
 
4
·6H
 
2
O
System:MonoclinicColour:Bright sky-blue; pale ...
Lustre:Vitreous, PearlyHardness:2½
Name:Named after Frederick Leslie Ransom (1868-1935), American Professor of mining geology.
This page provides mineralogical data about Ransomite.

Classification of Ransomite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:6/C.11-20
Nickel-Strunz 10th (pending) edition ID:7.CB.80

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
Dana 8th edition ID:29.7.1.1

29 : HYDRATED ACID AND NORMAL SULFATES
7 : AB2(XO4)4·H2O
Hey's CIM Ref.:25.2.24

25 : Sulphates
2 : Sulphates of Cu and Ag
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Type Occurrence of Ransomite

Type Locality:United Verde Mine (The Big Hole; Big Hole property; Hull Mine; Hopewell tunnel; Patented claim 3480; Patented claim 2812; Patented claims 3348), Jerome, Verde District, Black Hills (Black Hill Range), Yavapai Co., Arizona, USA
General Appearance of Type Material:Crusts and radiating tufts.
Year of Discovery:1928
Geological Setting of type material:Burning pyritic ore body.

Physical Properties of Ransomite

Lustre:Vitreous, Pearly
Diaphaneity (Transparency):Transparent
Comment:Pearly on cleavages
Colour:Bright sky-blue; pale blue in transmitted light.
Hardness (Mohs):2½
Cleavage:Perfect
Perfect on {001}
Density (measured):2.632 g/cm3
Density (calculated):2.735 g/cm3

Crystallography of Ransomite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 4.811(2) Å, b = 16.217(4) Å, c = 10.403(2) Å
β = 93.01(2)°
Ratio:a:b:c = 0.297 : 1 : 0.641
Unit Cell Volume:V 810.52 ų (Calculated from Unit Cell)
Z:2

Optical Data of Ransomite

Type:Biaxial (+)
RI values: nα = 1.631(5) nβ = 1.643(5) nγ = 1.695(5)
Maximum Birefringence:δ = 0.064

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v strong

Chemical Properties of Ransomite

Formula:
CuFe
 
2
(SO
 
4
)
 
4
·6H
 
2
O
Essential elements:Cu, Fe, H, O, S
All elements listed in formula:Cu, Fe, H, O, S
Empirical Formula:
CuFe
3+
2
(SO
 
4
)
 
4
·6H
 
2
O
Common Impurities:Al

Relationship of Ransomite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.CB.05Dwornikite
(Ni,Fe)SO
 
4
·H
 
2
O
7.CB.05Gunningite
(Zn,Mn)SO
 
4
·H
 
2
O
7.CB.05Kieserite
MgSO
 
4
·H
 
2
O
7.CB.05Poitevinite
(Cu,Fe,Zn)SO
 
4
·H
 
2
O
7.CB.05Szmikite
MnSO
 
4
·H
 
2
O
7.CB.05Szomolnokite
FeSO
 
4
·H
 
2
O
7.CB.05Cobaltkieserite
CoSO
 
4
·H
 
2
O
7.CB.07Sanderite
MgSO
 
4
·2H
 
2
O
7.CB.10Bonattite
CuSO
 
4
·3H
 
2
O
7.CB.15Aplowite
(Co,Mn,Ni)SO
 
4
·4H
 
2
O
7.CB.15Boyleite
(Zn,Mg)SO
 
4
·4H
 
2
O
7.CB.15Ilesite
(Mn,Zn,Fe)SO
 
4
·4H
 
2
O
7.CB.15Rozenite
FeSO
 
4
·4H
 
2
O
7.CB.15Starkeyite
MgSO
 
4
·4H
 
2
O
7.CB.15IMA2002-034
CdSO
 
4
·4H
 
2
O
7.CB.20Chalcanthite
CuSO
 
4
·5H
 
2
O
7.CB.20Jôkokuite
MnSO
 
4
·5H
 
2
O
7.CB.20Pentahydrite
MgSO
 
4
·5H
 
2
O
7.CB.20Siderotil
FeSO
 
4
·5H
 
2
O
7.CB.25Bianchite
(Zn,Fe)SO
 
4
·6H
 
2
O
7.CB.25Chvaleticeite
(Mn,Mg)SO
 
4
·6H
 
2
O
7.CB.25Ferrohexahydrite
FeSO
 
4
·6H
 
2
O
7.CB.25Hexahydrite
MgSO
 
4
·6H
 
2
O
7.CB.25Moorhouseite
(Co,Ni,Mn)SO
 
4
·6H
 
2
O
7.CB.25Nickelhexahydrite
(Ni,Mg,Fe)SO
 
4
·6H
 
2
O
7.CB.30Retgersite
NiSO
 
4
·6H
 
2
O
7.CB.35Bieberite
CoSO
 
4
·7H
 
2
O
7.CB.35Boothite
CuSO
 
4
·7H
 
2
O
7.CB.35Mallardite
MnSO
 
4
·7H
 
2
O
7.CB.35Melanterite
FeSO
 
4
·7H
 
2
O
7.CB.35Zincmelanterite
(Zn,Cu,Fe)SO
 
4
·7H
 
2
O
7.CB.35Alpersite
(Mg,Cu)[SO
 
4
] · 7H
 
2
O
7.CB.40Epsomite
MgSO
 
4
·7H
 
2
O
7.CB.40Goslarite
ZnSO
 
4
·7H
 
2
O
7.CB.40Morenosite
NiSO
 
4
·7H
 
2
O
7.CB.45Alunogen
Al
 
2
(SO
 
4
)
 
3
·17H
 
2
O
7.CB.45Meta-alunogen
Al
 
2
(SO
 
4
)
 
3
·12H
 
2
O
7.CB.55Coquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
7.CB.55Paracoquimbite
Fe
 
2
(SO
 
4
)
 
3
·9H
 
2
O
7.CB.55Rhomboclase
(H
 
5
O
 
2
)Fe
3+
 
(SO
 
4
)
 
2
·2H
 
2
O
7.CB.60Kornelite
Fe
 
2
(SO
 
4
)
 
3
·7H
 
2
O
7.CB.65Quenstedtite
Fe
 
2
(SO
 
4
)
 
3
·10H
 
2
O
7.CB.70Lausenite
Fe
 
2
(SO
 
4
)
 
3
·6H
 
2
O
7.CB.75Lishizhenite
ZnFe
 
2
(SO
 
4
)
 
4
·14H
 
2
O
7.CB.75Römerite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·14H
 
2
O
7.CB.85Apjohnite
Mn
2+
 
Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Bílinite
Fe
2+
 
Fe
3+
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Dietrichite
(Zn,Fe
2+
 
,Mn
2+
 
)Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Halotrichite
FeAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Pickeringite
MgAl
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Redingtonite
(Fe
2+
 
,Mg,Ni)(Cr,Al)
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.85Wupatkiite
(Co,Mg,Ni)Al
 
2
(SO
 
4
)
 
4
·22H
 
2
O
7.CB.90Meridianiite
MgSO
 
4
·11H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
25.2.1Chalcocyanite
CuSO
 
4
25.2.2Bonattite
CuSO
 
4
·3H
 
2
O
25.2.3Chalcanthite
CuSO
 
4
·5H
 
2
O
25.2.4Boothite
CuSO
 
4
·7H
 
2
O
25.2.5Dolerophanite
Cu
 
2
[O|SO
 
4
]
25.2.6Antlerite
Cu
 
3
[(OH)
 
4
|SO
 
4
]
25.2.7Brochantite
Cu
 
4
[(OH)
 
6
|SO
 
4
]
25.2.8Posnjakite
Cu
 
4
[(OH)
 
6
|SO
 
4
] · H
 
2
O
25.2.9Langite
Cu
 
4
[(OH)
 
6
|SO
 
4
] · 2H
 
2
O
25.2.10Wroewolfeite
Cu
 
4
[(OH)
 
6
|SO
 
4
] · 2H
 
2
O
25.2.11Kröhnkite
Na
 
2
Cu(SO
 
4
)
 
2
·2H
 
2
O
25.2.12Natrochalcite
NaCu
 
2
[OH|(SO
 
4
)
 
2
] · 2H
 
2
O
25.2.13Piypite
K
 
2
Cu
 
2
[O|(SO
 
4
)
 
2
]
25.2.14Fedotovite
K
 
2
Cu
 
3
[O|(SO
 
4
)
 
3
]
25.2.15Cyanochroite
K
 
2
Cu(SO
 
4
)
 
2
·6H
 
2
O
25.2.16Euchlorine
KNaCu
 
3
[O|(SO
 
4
)
 
3
]
25.2.17Devilline
CaCu
 
4
(SO
 
4
)
 
2
(OH)
 
6
·3H
 
2
O
25.2.18Leightonite
K
 
2
Ca
 
2
Cu(SO
 
4
)
 
4
·2H
 
2
O
25.2.19Chalcoalumite
CuAl
 
4
[(OH)
 
12
|SO
 
4
] · 3H
 
2
O
25.2.20Cyanotrichite
Cu
 
4
Al
 
2
[(OH)
 
12
|SO
 
4
] · 2H
 
2
O
25.2.21Woodwardite
Cu
 
4
Al
 
2
[(OH)
 
12
|SO
 
4
] · 2-4H
 
2
O
25.2.22Campigliaite
Mn
2+
 
Cu
 
4
[(OH)
 
6
|(SO
 
4
)
 
2
] · 4H
 
2
O
25.2.23Guildite
CuFe
3+
 
[OH|(SO
 
4
)
 
2
] · 4H
 
2
O
25.2.26Klyuchevskite
K
 
3
Cu
 
3
(Fe
3+
 
,Al)[O|(SO
 
4
)
 
2
]
 
2
25.2.27Poitevinite
(Cu,Fe,Zn)SO
 
4
·H
 
2
O
25.2.28Argentojarosite
AgFe
3+
3
[(OH)
 
3
|SO
 
4
]
 
2

Other Names for Ransomite

Other Languages:
German:Ransomit
Russian:Рансомит
Spanish:Ransomita

Other Information

Other Information:Soluble in water.
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 Ransomite

Reference List:Lausen (1928) American Mineralogist: 13: 221.

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, 1124 pp.: 519-520.

American Mineralogist (1970): 55: 729-734.

Internet Links for Ransomite

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  • Raman and XRD data at RRUFF project
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  • Ransomite details from Handbook of Mineralogy (PDF)
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    Localities for Ransomite

    Hide Locality List
    The 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. ? 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.
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Plaka
            • Plaka Mines
    		No reference listed
    USA
     
    • Arizona
      • Cochise Co.
        • Mule Mts
          • Warren District
    		[MinRec 12:310]
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 352.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 352.
      • Yavapai Co.
        • Black Hills (Black Hill Range)
          • Verde District
            • Jerome
    		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: 519; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 352; Lausen, C. (1928), Hydrous sulphates formed under fumerolic conditions at the United Verde mine, AmMin: 13: 203-229; Wood, M.M. (1970), The crystal structure of ransomite, Am.Min.: 55: 729-734; Galbraith, F.W. & Brennan (1959), Minerals of AZ: 62.
    Mineral and/or Locality
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