Cobaltneustadtelite Mineral Data (original) (raw)
General Cobaltneustadtelite Information
Chemical Formula:
Bi2Fe+++(Co,Fe+++)(O,OH)2(OH)2(AsO4)2
Composition:
Molecular Weight = 876.83 gm
Iron 7.64 % Fe 10.93 % Fe2O3
Cobalt 4.03 % Co 5.67 % Co2O3
Nickel 1.34 % Ni 1.70 % NiO
Bismuth 47.67 % Bi 53.14 % Bi2O3
Arsenic 17.09 % As 26.21 % As2O5
Hydrogen 0.33 % H 2.98 % H2O
Oxygen 21.90 % O
______ ______
100.00 % 100.64 % = TOTAL OXIDE
Empirical Formula:
Bi2Fe3+1.2Co0.6Ni0.2O1.1(OH)2.9(AsO4)2
Environment:
Small vugs in coarse quartz crystals. Small vugs in coarse quartz crystals. Co analogue of neust�dtelite and medenbachite; structure
IMA Status:
Approved IMA 2000 (Dana # Added)
Locality:
Mine dumps in the Schneeberg-Neust�dtel area, Saxony, Germany. Link to MinDat.org Location Data.
Name Origin:
Named after the locality and chemical composition.
Synonym:
IMA2000-012
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Cobaltneustadtelite Crystallography
Axial Ratios:
a:b:c =1.4892:1:1.5188
Cell Dimensions:
a = 9.156, b = 6.148, c = 9.338, Z = 2; alpha = 83.24°, beta = 70.56°, gamma = 86.91° V = 491.52 Den(Calc)= 5.92
Crystal System:
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io): 3.753(1)(202), 2.901(0.96)(203), 2.666(0.72)(202),3.551(0.55)(210), 8.756(0.55)(001), 3.507(0.44)(211), 2.531(0.41)(013),
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Crystal Structure:
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| | Krause W , Bernhardt H J , McCammon C A , Effenberger H , American Mineralogist , 87 (2002) p.726-738, Neustadtelite and cobaltneustadtelite, the Fe- and Co- analogues of medenbachite | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
Physical Properties of Cobaltneustadtelite
Cleavage:
{001} Good
Color:
Brown.
Diaphaneity:
Transparent to Translucent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Adamantine
Streak:
light brown
Optical Properties of Cobaltneustadtelite
Gladstone-Dale:
CI calc= 0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1819,KC= 0.19
Ncalc = 2.12
Optical Data:
Biaxial (-), a=2.02, b=2.09, g=2.12, bire=0.1000
Calculated Properties of Cobaltneustadtelite
Electron Density:
Bulk Density (Electron Density)=5.18 gm/cc
note: Specific Gravity of Cobaltneustadtelite =5.92 gm/cc.
Fermion Index:
Fermion Index = 0.0018776641
Boson Index = 0.9981223359
Photoelectric:
PECobaltneustadtelite = 893.33 barns/electron
U=PECobaltneustadtelite x rElectron Density=4,630.87 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cobaltneustadtelite is Not Radioactive
Cobaltneustadtelite Classification
Dana Class:
41.04.09.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
(41.04)where (A B)5 (XO4)2 Zq
(41.04.09)Medenbachite Group
41.04.09.01 Medenbachite! Bi2Fe(Cu,Fe)(O,OH)2(OH)2(AsO4)2 P1 1
41.04.09.02 Neustadtelite! Bi2Fe(Fe,Co)(O,OH)2(OH)2(AsO4)2 P1 1
41.04.09.03 Cobaltneustadtelite! Bi2Fe(Co,Fe)(O,OH)2(OH)2(AsO4)2 P1 1
Strunz Class:
08.BK.10 08 - PHOSPHATES, ARSENATES, VANADATES
08.B - Phosphates, etc. with Additional Anions, without H2O
08.BK -With medium-sized and large cations, (OH, etc.)
08.BK.10 Medenbachite! Bi2Fe(Cu,Fe)(O,OH)2(OH)2(AsO4)2 P1 1
08.BK.10 Cobaltneustadtelite! Bi2Fe(Co,Fe)(O,OH)2(OH)2(AsO4)2 P1 1
08.BK.10 Neustadtelite! Bi2Fe(Fe,Co)(O,OH)2(OH)2(AsO4)2 P1 1
Other Cobaltneustadtelite Information
References:
NAME( AmMin, Vol 87, p 726) PHYS. PROP.(AmMin, Vol 87, p 726) OPTIC PROP.(AmMin, Vol 87, p 726)
See Also:
Links to other databases for Cobaltneustadtelite :
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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Print or Cut-and-Paste your Cobaltneustadtelite Specimen Label here :
Cobaltneustadtelite
Bi2Fe+++(Co,Fe+++)(O,OH)2(OH)2(AsO4)2
Dana No: 41.04.09.03 Strunz No: 08.BK.10
Locality:
Notes: