Donbassite Mineral Data

Advertisment

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

General Donbassite Information

Chemical Formula:

Al2[Al2.33][Si3AlO10](OH)8

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

Empirical Formula:

Al_5.33Si₃O₁₀(OH)₈

Environment:

Hydrothermal alteration product of andalusite and spodumene.

IMA Status:

Valid Species (Pre-IMA) 1940

Locality:

Utrennyaia shaft and Uralskaya vein, Nagolyn area, Donbass region, Ukraine. Link to MinDat.org Location Data.

Name Origin:

Named in 1940 for the location.

Name Pronunciation:

Donbassite + Pronunciation

Synonym:

Chloritite alpha

Donbassite Image

Images:

Donbassite

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

Donbassite Crystallography

Axial Ratios:

a:b:c =0.5771:1:1.5827

Cell Dimensions:

a = 5.16, b = 8.94, c = 14.15, Z = 2; beta = 93.83° V = 651.29 Den(Calc)= 2.67

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 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

Cleavage:

{001} Perfect

Color:

White, Greenish white, Yellowish white.

Density:

2.63 - 2.64, Average = 2.63

Fracture:

Elastic - Fragments which spring back after bending.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Pearly

Streak:

white

Optical Properties of Donbassite

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

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

Electron Density:

Bulk Density (Electron Density)=2.65 gm/cc
note: Specific Gravity of Donbassite =2.64 gm/cc.

Fermion Index:

Fermion Index = 0.0077722417
Boson Index = 0.9922277583

Photoelectric:

PE_Donbassite= 1.45 barns/electron
U=PE_Donbassite x rElectron Density= 3.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Donbassite is Not Radioactive

Donbassite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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

Search for Donbassite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Donbassite :

A Bijoux Google Search for Donbassite
Adam's Minerals Google Search for Donbassite
Cape Minerals Google Search for Donbassite
Dakota Matrix Minerals Google Search for Donbassite
Excalibur Mineral Corp. Google Search for Donbassite
Exceptional Minerals Google Search for Donbassite
John Betts Fine Minerals Search for Donbassite
McDougall Minerals Google Search for Donbassite
Mineral News Website Link
Rock and Mineral Shows Google Search for Donbassite
Weinrich Minerals, Inc. Google Search for Donbassite

Ask about Donbassite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: