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Ransomite Mineral Data

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General Ransomite Information

Help on Chemical  Formula: Chemical Formula: CuFe+++2(SO4)4•6(H2O)
Help on Composition: Composition: Molecular Weight = 667.59 gm
   Iron      16.73 %  Fe   23.92 % Fe2O3
   Copper     9.52 %  Cu   11.92 % CuO
   Hydrogen   1.81 %  H    16.19 % H2O
   Sulfur    19.21 %  S    47.97 % SO3
   Oxygen    52.73 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuFe3+2(SO4)4•6(H2O)
Help on Environment: Environment: Hydrated sulfate formed as the result of a mine fire in a copper mine.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1928
Help on Locality: Locality: United Verde mine, Jerome, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Federick Leslie Ransome (1868-1935), U.S. Mining geologist.
Help on Name Pronunciation: Name Pronunciation: Ransomite + Pronunciation Say RANSOMITE
Help on Synonym: Synonym: ICSD 15177
  PDF 71-2375

Ransomite Image

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Comments: Pale bluish-green powdery ransomite.
Location: United Verde Mine, Jerome, Black Hills, Verde District, Yavapai Co., Arizona, USA. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Ransomite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2966:1:0.6414
Help on Cell Dimensions: Cell Dimensions: a = 4.811, b = 16.217, c = 10.403, Z = 2; beta = 93.017° V = 810.52 Den(Calc)= 2.74
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c

Physical Properties of Ransomite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Blue.
Help on Density: Density: 2.63
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: bluish white

Optical Properties of Ransomite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.059 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2395,KPDmeas= 0.2496,KC= 0.2356
Ncalc = 1.62 - 1.65
Help on Optical Data: Optical Data: Biaxial (+), a=1.631, b=1.643, g=1.695, bire=0.0640

Calculated Properties of Ransomite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Ransomite =2.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0052437594
Boson Index = 0.9947562406
Help on Photoelectric: Photoelectric: PERansomite = 10.12 barns/electron
U=PERansomite x rElectron Density= 27.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ransomite is Not Radioactive

Ransomite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.07)where A (B)2 (XO4)4 � x(H2O)
  (29.07.01)Dana Group Ransomite CuFe2(SO4)4•6(H2O) P 21/c 2/m
Help on  Strunz Class: Strunz Class: 07.CB.80 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
07.CB.80 Ransomite CuFe2(SO4)4•6(H2O) P 21/c 2/m

Other Ransomite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Ransomite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 07.CB.80





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