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Donbassite Mineral Data + |
General Donbassite Information |
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| Al2[Al2.33][Si3AlO10](OH)8 | |||
| 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 | |||
| Al5.333Si3O10(OH)8 | |||
| Hydrothermal alteration product of andalusite and spodumene. | |||
| Valid Species (Pre-IMA) 1940 | |||
| Utrennyaia shaft and Uralskaya vein, Nagolyn area, Donbass region, Ukraine. Link to MinDat.org Location Data. | |||
| Named in 1940 for the location. | |||
| Chloritite alpha | |||
Donbassite Image | |||
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Donbassite Crystallography |
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| a:b:c =0.5771:1:1.5827 | |||
| a = 5.16, b = 8.94, c = 14.15, Z = 2; beta = 93.83° V = 651.29 Den(Calc)= 2.67 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | |||
| 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 |
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| [001] Perfect | |||
| White, Greenish white, Yellowish white. | |||
| 2.63 - 2.64, Average = 2.63 | |||
| Elastic - Fragments which spring back after bending. | |||
| Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). | |||
| Granular - Generally occurs as anhedral to subhedral crystals in matrix. | |||
| 2-2.5 - Gypsum-Finger Nail | |||
| Pearly | |||
| white | |||
Optical Properties of Donbassite |
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| 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 |
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| 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 |
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relectron=2.65 gm/cc |
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| Fermion Index = 0.00777 Boson Index = 0.99223 |
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PEDonbassite = 1.45 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Donbassite is Not Radioactive |
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Donbassite Classification |
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| 71.4.1.1 (71)Phyllosilicate Sheets of Six-Membered Rings | |||
| (71.4)interlayered 1:1, 2:1, and octahedra | |||
| (71.4.1)Chlorite group (Tri-Dioctahedral) | |||
| VIII/HX.00-00 VIII - Silicates | |||
| VIII/HX - Unclassified Strunz Phyllosilicates | |||
| VIII/HX.00 - Chlorite Group | |||
Other Donbassite Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |||
| Links to other databases for Donbassite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas Search for Donbassite using: Visit our Advertisers for Donbassite : Translate Donbassite Mineral Data : Ask about Donbassite here : Print or Cut-and-Paste your Donbassite Specimen Label here :
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