Kochsandorite Mineral Data

Kochsandorite Mineral Data

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General Kochsandorite Information

Chemical Formula:

CaAl2(CO3)2(OH)4·H2O

Composition:

Molecular Weight = 300.10 gm

Calcium 13.35 % Ca 18.69 % CaO

Aluminum 17.98 % Al 33.98 % Al₂O₃

Hydrogen 2.02 % H 18.01 % H₂O

Carbon 8.00 % C 29.33 % CO₂

Oxygen 58.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaAl₂(CO₃)₂(OH)₄·(H₂O)

Environment:

Dresserite group

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Mány coal deposit, Tatabánya, Hungary Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

Synonym:

IMA2004-037

Kochsandorite Image

Images:

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

Images:

Kochsandorite

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

Kochsandorite Crystallography

Axial Ratios:

a:b:c =2.7837:1:1.6297

Cell Dimensions:

a = 15.564, b = 5.591, c = 9.112, Z = 4; V = 792.91 Den(Calc)= 2.51

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

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

By Intensity(I/I_o): 5.92(1), 7.86(0.87), 4.37(0.86),7.78(0.62), 2.957(0.48), 2.946(0.44), 1.902(0.26), 2.569(0.17),

Optical Properties of Kochsandorite

Optical Data:

NCalc= 1.58 - from Gladstone-Dale relationship (KC = 0.2327) where Ncalc=Dcalc*KC+1

Calculated Properties of Kochsandorite

Electron Density:

r_electron=2.54 gm/cc
note: r_{Kochsandorite}=2.51 gm/cc.

Fermion Index

Fermion Index = 0.00134
Boson Index = 0.99866

Photoelectric:

PE_{Kochsandorite}= 2.30 barns/electron
U=PE_{Kochsandorite} x r_electron= 5.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kochsandorite is Not Radioactive

Kochsandorite Classification

Dana Class:

16b.2.1.5 (16b)Carbonates - Hydroxyl or Halogen

(16b.2)where (A)m (B)n (XO3)p Zq · x(H2O), with (m+n):p=3:2

(16b.2.1)Dana Group

16b.2.1.1 Dundasite PbAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.2 Dresserite BaAl2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.3 Strontiodresserite (Sr,Ca)Al2(CO3)2(OH)4·(H2O) Pbmm 2/m 2/m 2/m

16b.2.1.4 Petterdite! PbCr2(CO3)2(OH)4·H2O Pbnm 2/m 2/m 2/m

16b.2.1.5 Kochsandorite ! CaAl2(CO3)2(OH)4·H2O P nma 2/m 2/m 2/m

Strunz Class:

V/X.00-00 V - Nitrates, Carbonates and Borates

V/X - Unclassified Strunz Nitrates, Carbonates and Borates

V/X.00 - Dresserite group

Other Kochsandorite Information

See Also:

Links to other databases for Kochsandorite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Kochsandorite Specimen Label here :

Kochsandorite

CaAl2(CO3)2(OH)4·H2O
Dana No: 16b.2.1.5 Strunz No: V/X.00-00
Locality:

Notes: