Donbassite Mineral Data

[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

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 - 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
13 - Ruff.Info

Search for Donbassite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Donbassite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Donbassite Mineral Data :

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: