Ramsbeckite Mineral Data

Ramsbeckite Mineral Data +

General Ramsbeckite Information

Chemical Formula:

(Cu,Zn)15(SO4)4(OH)22·6(H2O)

Composition:

Molecular Weight = 1,826.61 gm

Zinc 13.42 % Zn 16.71 % ZnO

Copper 39.14 % Cu 48.99 % CuO

Hydrogen 1.88 % H 16.77 % H₂O

Sulfur 7.02 % S 17.53 % SO₃

Oxygen 38.54 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu_11.25Zn_3.75(SO₄)₄(OH)₂₂·6(H₂O)

Environment:

Alteration product found in mine dumps.

IMA Status:

Approved IMA 1985

Locality:

Bastenberg mine, near Ramsbeck, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 63249

PDF 39-365

Ramsbeckite Image

Images:

Ramsbeckite

Comments: Green crystals of ramsbeckite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Ramsbeckite Crystallography

Axial Ratios:

a:b:c =1.0313:1:0.4559

Cell Dimensions:

a = 16.066, b = 15.577, c = 7.102, Z = 2; beta = 90.2° V = 1,777.34 Den(Calc)= 3.41

Crystal System:

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.09(1), 2.516(0.75), 2.694(0.3),

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
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Effenberger H , Neues Jahrbuch fur Mineralogie, Monatshefte , 1988 (1988) p.38-48, Ramsbeckite, (Cu,Zn)15(OH)22(SO4)4*6(H2O):, Revision of the chemical formula based on a structure determination, Locality: Bastenberg mine, Ramsbeck, Sauerland, Germany

Physical Properties of Ramsbeckite

Cleavage:

None

Color:

Green.

Density:

3.39

Diaphaniety:

Transparent to Translucent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

3.5 - Copper Penny

Luster:

Vitreous (Glassy)

Streak:

light green

Optical Properties of Ramsbeckite

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1945,KPDmeas= 0.1957,KC= 0.1977

Optical Data:

Biaxial (-), a=1.635, b=1.675, g=1.68, bire=0.0450, 2V(Calc)=38, 2V(Meas)=37.

Calculated Properties of Ramsbeckite

Electron Density:

r_electron=3.30 gm/cc
note: r_Ramsbeckite=3.39 gm/cc.

Fermion Index

Fermion Index = 0.00621
Boson Index = 0.99379

Photoelectric:

PE_Ramsbeckite= 24.02 barns/electron
U=PE_Ramsbeckite x r_electron= 79.24 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ramsbeckite is Not Radioactive

Ramsbeckite Classification

Dana Class:

31.4.9.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.4)where (A+ B++)4 (XO4) Zq·x(H2O)

(31.4.9)Dana Group

31.4.9.1 Ramsbeckite (Cu,Zn)15(SO4)4(OH)22·6(H2O) P 2₁/a 2/m

Strunz Class:

VI/D.03-75 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.03 - Langite series, Posnjakite - Nakuriite

VI/D.03-10 Posnjakite Cu4(SO4)(OH)6·(H2O) C 2/c 2/m

VI/D.03-20 Langite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-30 Wroewolfeite Cu4(SO4)(OH)6·2(H2O) Pc m

VI/D.03-40 Namuwite (Zn,Cu)4(SO4)(OH)6·4(H2O) Unk Hex

VI/D.03-50 Guarinoite (Zn,Co,Ni)6(SO4)(OH,Cl)10·5(H2O) P 6₃/m,P 6₃, or P 6₃22 Hex

VI/D.03-55 Theresemagnanite (Co,Zn,Ni)6(SO4)(OH,Cl)10·8(H2O) P 6₃ 6

VI/D.03-60 Schulenbergite (Cu,Zn)7(SO4,CO3)2(OH)10·3(H2O) P 3 or P 3- Trig

VI/D.03-65 Christelite! Zn3Cu2(SO4)2(OH)6·4(H2O) P1 1

VI/D.03-70 Ktenasite (Cu,Zn)5(SO4)2(OH)6·6(H2O) P 2₁/c 2/m

VI/D.03-75 Ramsbeckite (Cu,Zn)15(SO4)4(OH)22·6(H2O) P 2₁/a 2/m

VI/D.03-80 Campigliaite Cu4Mn(SO4)2(OH)6·4(H2O) C 2 2

VI/D.03-90 Nakauriite (Mn,Ni,Cu)8(SO4)4(CO3)(OH)6·48(H2O) Unk Ortho

Other Ramsbeckite 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 Ramsbeckite :
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

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Ramsbeckite

(Cu,Zn)15(SO4)4(OH)22·6(H2O)
Dana No: 31.4.9.1 Strunz No: VI/D.03-75
Locality:

Notes: