Mineralogy Database

Ktenasite Mineral Data

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General Ktenasite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Zn)5(SO4)2(OH)6•6(H2O)
Help on Composition: Composition: Molecular Weight = 758.33 gm
   Zinc      10.78 %  Zn   13.42 % ZnO
   Copper    31.42 %  Cu   39.34 % CuO
   Hydrogen   2.92 %  H    26.13 % H2O
   Sulfur     8.46 %  S    21.12 % SO3
   Oxygen    46.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu3.75Zn1.25(SO4)2(OH)6•8(H2O)
Help on Environment: Environment: Ancient lead slags altered by seawater.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1950
Help on Locality: Locality: Laurium, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Constantine A. Ktenas (1884-1935), Greek mineralogist.
Help on Name Pronunciation: Name Pronunciation: Ktenasite + Pronunciation Say KTENASITE
Help on Synonym: Synonym: ICSD 200402
  PDF 46-1361

Ktenasite Image

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Comments: Turquoise blue ktenasite on matrix.
Location: Gelbe Birke Mine, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 0.9 mm.
© Thomas Witzke / Abraxas-Verlag

Ktenasite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9145:1:3.882
Help on Cell Dimensions: Cell Dimensions: a = 5.598, b = 6.121, c = 23.762, Z = 2; beta = 95.55° V = 810.40 Den(Calc)= 3.11
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.82(1), 4.85(0.9), 5.95(0.85),

Physical Properties of Ktenasite

Help on Cleavage: Cleavage: None
Help on Color: Color: Blue, Blue green, Green, Emerald green.
Help on Density: Density: 2.94
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Ktenasite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1937,KPDmeas= 0.2049,KC= 0.2143
Ncalc = 1.63 - 1.67
Help on Optical Data: Optical Data: Biaxial (-), a=1.571, b=1.613, g=1.623, bire=0.0520, 2V(Calc)=50, 2V(Meas)=51.

Calculated Properties of Ktenasite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Ktenasite =2.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0052807029
Boson Index = 0.9947192971
Help on Photoelectric: Photoelectric: PEKtenasite = 19.14 barns/electron
U=PEKtenasite x rElectron Density= 55.83 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ktenasite is Not Radioactive

Ktenasite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.06)where (A+ B++)5 (XO4)2 Zq�x(H2O)
  (31.06.03)Dana Group Ktenasite (Cu,Zn)5(SO4)2(OH)6•6(H2O) P 21/c 2/m Christelite! Zn3Cu2(SO4)2(OH)6•4(H2O) P1 1
Help on  Strunz Class: Strunz Class: 07.DD.20 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
07.DD.20 Ktenasite (Cu,Zn)5(SO4)2(OH)6•6(H2O) P 21/c 2/m

Other Ktenasite 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 Ktenasite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 07.DD.20





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