IMA2000-043a Mineral Data

IMA2000-043a Mineral Data

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General IMA2000-043a Information

Chemical Formula:

(Al,Ga)2(Ge,C)O4 (OH)2

Composition:

Molecular Weight = 230.81 gm

Aluminum 17.54 % Al 33.13 % Al₂O₃

Gallium 15.10 % Ga 20.30 % Ga₂O₃

Germanium 23.59 % Ge 33.99 % GeO₂

Hydrogen 0.87 % H 7.81 % H₂O

Carbon 1.30 % C 4.77 % CO₂

Oxygen 41.59 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al_1.5Ga_0.5Ge_0.75C_0.25O₄(OH)₂

Environment:

Isotypic with topaz

IMA Status:

Proposed IMA 2003 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2000-043a Crystallography

Axial Ratios:

a:b:c =1.0684:1:0.5636

Cell Dimensions:

a = 9.1111, b = 8.5276, c = 4.8064, Z = 4; V = 373.44 Den(Calc)= 4.10

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): 3.016(1), 3.811(0.78), 3.315(0.48),2.247(0.38), 1.398(0.29), 2.417(0.27), 2.464(0.24),

Physical Properties of IMA2000-043a

Color:

Beige, White.

Diaphaniety:

Translucent

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of IMA2000-043a

Optical Data:

Biaxial (?)

NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.1965) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2000-043a

Electron Density:

r_electron=3.93 gm/cc
note: r_IMA2000-043a=4.10 gm/cc.

Fermion Index

Fermion Index = 0.01874
Boson Index = 0.98126

Photoelectric:

PE_IMA2000-043a= 23.08 barns/electron
U=PE_IMA2000-043a x r_electron= 90.61 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

IMA2000-043a is Not Radioactive

IMA2000-043a Classification

Dana Class:

52.3.1.2 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O

(52.3)with cations in [6] coordination only

(52.3.1)Dana Group

52.3.1.1 Topaz Al2SiO4(F,OH)2 Pbnm 2/m 2/m 2/m

52.3.1.2 IMA2000-043a ! (Al,Ga)2(Ge,C)O4(OH)2 P nma 2/m 2/m 2/m

Strunz Class:

VIII/AX.00-00 VIII - Silicates

VIII/AX - Unclassified Strunz Nesosilicates

VIII/AX.00 - Topaz Group

Other IMA2000-043a Information

See Also:

Links to other databases for IMA2000-043a :
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)

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Print or Cut-and-Paste your IMA2000-043a Specimen Label here :

IMA2000-043a

(Al,Ga)2(Ge,C)O4 (OH)2
Dana No: 52.3.1.2 Strunz No: VIII/AX.00-00
Locality:

Notes: