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Calcioandyrobertsite-2O Mineral Data

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General Calcioandyrobertsite-2O Information

Help on Chemical  Formula: Chemical Formula: KCaCu5(AsO4)4[As(OH)2O2]•2(H2O)
Help on Composition: Composition: Molecular Weight = 1,129.55 gm
   Potassium   3.46 %  K     4.17 % K2O
   Calcium     3.55 %  Ca    4.96 % CaO
   Copper     28.13 %  Cu   31.67 % Cu2O
   Arsenic    33.16 %  As   50.87 % As2O5
   Hydrogen    0.54 %  H     4.78 % H2O
   Oxygen     31.16 %  O
             ______        ______ 
             100.00 %       96.46 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KCaCu5(AsO4)4(OH)2AsO2•2(H2O)
Help on Environment: Environment: Occurs in a specimen of quartz gangue. Polymorph of calcioandyrobertsite; structure.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Tsumeb mine, Namibia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the -2O polytype of calcio-andyrobertsite-1M
Help on Name Pronunciation: Name Pronunciation: Calcioandyrobertsite-2O + Pronunciation Say CALCIOANDYROBERTSITE-2O
Help on Synonym: Synonym: Calcio-andyrobertsite-2O - Renamed Calcioandyrobertsite-2O by Mineralogical Record, v39 (2008), p131

Calcioandyrobertsite-2O Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.9477:1:0.9877
Help on Cell Dimensions: Cell Dimensions: a = 19.647, b = 10.087, c = 9.963, Z = 4; V = 1,974.46 Den(Calc)= 3.80
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.116(1)(322,610), 2.76(0.9)(132), 4.487(0.9)(220),4.83(0.7)(102), 7.084(0.7)(011), 3.965(0.6)(302), 6.665(0.6)(111), 9.8(0.5)(200), 1.758(0.4)(840,11.0.1),

Physical Properties of Calcioandyrobertsite-2O

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Intense blue.
Help on Density: Density: 3.9
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale blue

Optical Properties of Calcioandyrobertsite-2O

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1912,KPDmeas= 0.1863,KC= 0.1914
Ncalc = 1.73 - 1.75
Help on Optical Data: Optical Data: Biaxial (-), a=1.715, b=1.73, g=1.735, bire=0.0200

Calculated Properties of Calcioandyrobertsite-2O

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.57 gm/cc
note: Specific Gravity of Calcioandyrobertsite-2O =3.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000202433
Boson Index = 0.999797567
Help on Photoelectric: Photoelectric: PECalcioandyrobertsite-2O = 36.27 barns/electron
U=PECalcioandyrobertsite-2O x relectron= 129.57 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Calcioandyrobertsite-2O per GRapi unit = 2.13 (%)

Estimated Radioactivity from Calcioandyrobertsite-2O - barely detectable


Calcioandyrobertsite-2O Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.02)Souzalite Group Souzalite (Mg,Fe)3(Al,Fe)4(PO4)4(OH)6•2(H2O) P1,P 1 Tri Gormanite Fe3Al4(PO4)4(OH)6•2(H2O) P1,P 1 Tri Andyrobertsite! KCdCu5(AsO4)4[As(OH)2O2]•2(H2O) P 21/m 2/m Calcioandyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P 21/m 2/m Calcioandyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.DH.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
08.DH.50 Andyrobertsite! KCdCu5(AsO4)4[As(OH)2O2]•2(H2O) P 21/m 2/m
08.DH.50 Calcioandyrobertsite-1M! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P 21/m 2/m
08.DH.50 Calcioandyrobertsite-2O! KCaCu5(AsO4)4[As(OH)2O2]•2(H2O) P nma 2/m 2/m 2/m

Other Calcioandyrobertsite-2O Information

Help on References: References: NAME( EurJMin, 16:163) PHYS. PROP.(EurJMin, 16:163) OPTIC PROP.(EurJMin, 16:163)
Help on See Also: See Also: Links to other databases for Calcioandyrobertsite-2O :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.DH.50





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