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Kochsandorite Mineral Data

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General Kochsandorite Information

Help on Chemical  Formula: Chemical Formula: CaAl2(CO3)2(OH)4•H2O
Help on Composition: Composition: Molecular Weight = 295.50 gm
   Calcium   12.21 %  Ca   17.08 % CaO
   Aluminum  18.26 %  Al   34.50 % Al2O3
   Hydrogen   2.25 %  H    20.12 % H2O
   Carbon     7.72 %  C    28.30 % CO2
   Oxygen    59.56 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.9Al2(CO3)1.9(OH)4•1.3(H2O)
Help on Environment: Environment: Formed from the weathering of b�hmite, pyrite, and calcite and occur as spherical aggregates that form pale brown strings in Eocene brown coal deposits. Dresserite group.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: M�ny coal deposit, Tatab�nya, Hungary Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after S�ndor Koch, (1896-1983), professor in the Department of Mineralogy, Petrography and Geochemistry Josef Atilla University.
Help on Synonym: Synonym: IMA2004-037
 

Kochsandorite Image

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  Kochsandorite

Comments: Pearly circles of radiating white microcrystals of kochsandorite on coal.
Location: Many coal deposit, Bicske-Zsambeki Basin, Tatabanya. Scale: 2.5x1.7x1.1 cm.
© Richard Dale / Dale Minerals

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  Kochsandorite

Comments: White fibers of kochandorite on coal-marl matrix.
Location: Mány coal field, Tatabánya, Hungary. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Kochsandorite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.7837:1:1.6297
Help on Cell Dimensions: Cell Dimensions: a = 15.564, b = 5.591, c = 9.112, Z = 4; V = 792.91 Den(Calc)= 2.48
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): 5.9154(1)(201), 7.8607(0.87)(101), 4.3718(0.858)(102),7.783(0.678)(200), 2.957(0.476)(402), 2.9455(0.44)(501), 1.9021(0.257)(620), 2.5687(0.17)(502), 3.5772(0.149)(401),
 

Physical Properties of Kochsandorite

Help on Cleavage: Cleavage: None
Help on Color: Color: White.
Help on Density: Density: 2.486
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: white
 

Optical Properties of Kochsandorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2419,KPDmeas= 0.2414,KC= 0.2354
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.597, g=1.603, bire=0.0060
 

Calculated Properties of Kochsandorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Kochsandorite =2.49 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013035512
Boson Index = 0.9986964488
Help on Photoelectric: Photoelectric: PEKochsandorite = 2.17 barns/electron
U=PEKochsandorite x rElectron Density= 5.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kochsandorite is Not Radioactive
 

Kochsandorite Classification

Help on  Dana Class: Dana Class: 16b.02.01.05 (16b)Carbonates - Hydroxyl or Halogen
  (16b.02)where (A)m (B)n (XO3)p Zq � x(H2O), with (m+n):p=3:2
  (16b.02.01)Dundasite Group
 
16b.02.01.01 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.02 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.03 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
16b.02.01.04 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 
16b.02.01.05 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 05.DB.10 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DB -With large and medium-sized cations
 
05.DB.10 Dresserite BaAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Dundasite PbAl2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Kochsandorite! CaAl2(CO3)2(OH)4•H2O P nma 2/m 2/m 2/m
 
05.DB.10 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4•(H2O) Pbmm 2/m 2/m 2/m
 
05.DB.10 Petterdite! PbCr2(CO3)2(OH)4•H2O Pbnm 2/m 2/m 2/m
 

Other Kochsandorite Information

Help on References: References: NAME( AmMin, v92:1777) PHYS. PROP.(AmMin, v92:1777) OPTIC PROP.(AmMin, v92:1777)
Help on See Also: See Also: Links to other databases for Kochsandorite :
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 Kochsandorite Specimen Label here :

Kochsandorite

CaAl2(CO3)2(OH)4•H2O
Dana No: 16b.02.01.05 Strunz No: 05.DB.10
Locality:

 

Notes:

 

 
   
 


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