Mineralogy Database

Donbassite Mineral Data

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General Donbassite Information

Help on Chemical  Formula: Chemical Formula: Al2[Al2.33][Si3AlO10](OH)8
Help on Composition: Composition: Molecular Weight = 524.20 gm
   Aluminum  27.45 %  Al   51.87 % Al2O3
   Silicon   16.07 %  Si   34.39 % SiO2
   Hydrogen   1.54 %  H    13.75 % H2O
   Oxygen    54.94 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al5.33Si3O10(OH)8
Help on Environment: Environment: Hydrothermal alteration product of andalusite and spodumene.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1940
Help on Locality: Locality: Utrennyaia shaft and Uralskaya vein, Nagolyn area, Donbass region, Ukraine. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1940 for the location.
Help on Name Pronunciation: Name Pronunciation: Donbassite + Pronunciation Say DONBASSITE
Help on Synonym: Synonym: Chloritite alpha
 

Donbassite Image

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  Donbassite

Comments: Translucent white crystalline donbassite.
Location: Donetz Basin, Ukraine. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Donbassite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5771:1:1.5827
Help on Cell Dimensions: Cell Dimensions: a = 5.16, b = 8.94, c = 14.15, Z = 2; beta = 93.83° V = 651.29 Den(Calc)= 2.67
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.33(1), 4.71(1), 3.98(0.9),7.06(0.7), 3.53(0.6), 14.1(0.6), 2.52(0.5), 4.48(0.5),
 

Physical Properties of Donbassite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: White, Greenish white, Yellowish white.
Help on Density: Density: 2.63 - 2.64, Average = 2.63
Help on Fracture: Fracture: Elastic - Fragments which spring back after bending.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Donbassite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2156,KPDmeas= 0.2185,KC= 0.2256
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.56-1.578, b=1.566-1.582, g=1.572-1.596, bire=0.0120-0.0180, 2V(Calc)=58-88, 2V(Meas)=48-55. Dispersion r > v.
 

Calculated Properties of Donbassite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Donbassite =2.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077722417
Boson Index = 0.9922277583
Help on Photoelectric: Photoelectric: PEDonbassite = 1.45 barns/electron
U=PEDonbassite x rElectron Density= 3.84 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Donbassite is Not Radioactive
 

Donbassite Classification

Help on  Dana Class: Dana Class: 71.04.01.01 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.04)interlayered 1:1, 2:1, and octahedra
  (71.04.01)Chlorite group (Tri-Dioctahedral)
 
71.04.01.01 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m
 
71.04.01.02 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
71.04.01.03 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
71.04.01.04 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.04.01.05 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.04.01.06 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
71.04.01.07 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
71.04.01.08 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.04.01.09 Orthochamosite! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
71.04.01.10 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EC.55 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.55 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m
 
09.EC.55 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
09.EC.55 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
09.EC.55 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
09.EC.55 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
09.EC.55 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2
 
09.EC.55 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
09.EC.55 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho
 
09.EC.55 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m
 
09.EC.55 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
09.EC.55 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
09.EC.55 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
09.EC.55 Glagolevite! NaMg6[Si3AlO10](OH,O)8•H2O C1 1
 
09.EC.55 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
 

Other Donbassite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Donbassite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Donbassite

Al2[Al2.33][Si3AlO10](OH)8
Dana No: 71.04.01.01 Strunz No: 09.EC.55
Locality:

 

Notes:

 

 
   
 


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