Ransomite Mineral Data

Ransomite Mineral Data +

[Welcome] [Newest Minerals] [Gallery] [About Us] [How to Buy]
We are www.minernet.it, an Italian company which deals rare, unusual,
and showy mineral specimens. We specialise in minerals from Tsumeb,
Mont Saint Hilaire, Bolivia and Major Italian sites.

General Ransomite Information

Chemical Formula:

CuFe+++2(SO4)4·6(H2O)

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

Empirical Formula:

CuFe³⁺₂(SO₄)₄·6(H₂O)

Environment:

Hydrated sulfate formed as the result of a mine fire in a copper mine.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

United Verde mine, Jerome, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Federick Leslie Ransome (1868-1935), U.S. Mining geologist.

Synonym:

ICSD 15177

PDF 71-2375

Ransomite Image

Images:

Ransomite

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

Axial Ratios:

a:b:c =0.2966:1:0.6414

Cell Dimensions:

a = 4.811, b = 16.217, c = 10.403, Z = 2; beta = 93.017° V = 810.52 Den(Calc)= 2.74

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wood M M , American Mineralogist , 55 (1970) p.729-734, The crystal structure of ransomite

Physical Properties of Ransomite

Cleavage:

[001] Perfect

Color:

Blue.

Density:

2.63

Diaphaniety:

Transparent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Streak:

bluish white

Optical Properties of Ransomite

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

Optical Data:

Biaxial (+), a=1.631, b=1.643, g=1.695, bire=0.0640

Calculated Properties of Ransomite

Electron Density:

r_electron=2.73 gm/cc
note: r_Ransomite=2.74 gm/cc.

Fermion Index

Fermion Index = 0.00524
Boson Index = 0.99476

Photoelectric:

PE_Ransomite= 10.12 barns/electron
U=PE_Ransomite x r_electron= 27.68 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ransomite is Not Radioactive

Ransomite Classification

Dana Class:

29.7.1.1 (29)Hydrated Acid and Sulfates

(29.7)where A (B)2 (XO4)4 · x(H2O)

(29.7.1)Dana Group

29.7.1.1 Ransomite CuFe2(SO4)4·6(H2O) P 2₁/c 2/m

Strunz Class:

VI/C.11-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium size

VI/C.11 - Römerite - Ransomite series

VI/C.11-10 Romerite Fe3(SO4)4·14(H2O) P1 1

VI/C.11-15 Lishizhenite ZnFe2(SO4)4·14(H2O) P1 1

VI/C.11-20 Ransomite CuFe2(SO4)4·6(H2O) P 2₁/c 2/m

Other Ransomite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ransomite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Ransomite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ransomite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Ransomite Mineral Data :

Ask about Ransomite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Ransomite Specimen Label here :

Ransomite

CuFe+++2(SO4)4·6(H2O)
Dana No: 29.7.1.1 Strunz No: VI/C.11-20
Locality:

Notes: