Danalite Mineral Data + Say DANALITE

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General Danalite Information

Help on Chemical  Formula: Chemical Formula: Fe++4Be3(SiO4)3S
Help on Composition: Composition: Molecular Weight = 558.74 gm
   Beryllium   4.84 %  Be   13.43 % BeO
   Iron       39.98 %  Fe   51.43 % FeO
   Silicon    15.08 %  Si   32.26 % SiO2
   Sulfur      5.74 %  S     5.74 % S2-
                -   %  S    -2.86 % -O=S
   Oxygen     34.36 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+4Be3(SiO4)3S
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1866
Help on Locality: Locality: Essex Co., Massachusetts, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after James Dwight Dana (1813-1895), American mineralogist and author of the Dana mineral classification.
Help on Synonym: Synonym: ICSD 201639
  PDF 11-491
 

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Danalite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 8.17, Z = 2; V = 545.34 Den(Calc)= 3.40
Help on Crystal System: Crystal System: Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: P 43n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.35(1), 1.932(0.7), 2.193(0.5),
Click Here for Large Danalite Structure Window Crystal Structure:

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Hassan I , Grundy H D , American Mineralogist , 70 (1985) p.186-192, The crystal structures of helvite group minerals, (MnFeZn)8(Be6Si6O24)S2

View Additional jPOWD Structure files for Danalite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Danalite

Help on Cleavage: Cleavage: [111] Indistinct
Help on Color: Color: Brown, Brownish black, Grayish yellow, Pink, Reddish brown.
Help on Density: Density: 3.43
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: gray white
 

Optical Properties of Danalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.133 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.143 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2241,KPDmeas= 0.2222,KC= 0.196
Help on Optical Data: Optical Data: Isotropic, n=1.753-1.771.
 

Calculated Properties of Danalite

Help on Electron Density: Electron Density:

relectron=3.31 gm/cc
note: rDanalite =3.43 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0645
Boson Index = 0.9355
Help on Photoelectric: Photoelectric:

PEDanalite = 12.95 barns/electron
U=PEDanalite x relectron= 42.94 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Danalite is Not Radioactive

 

Danalite Classification

Help on  Dana Class: Dana Class: 76.2.4.2 (76)Tectosilicate Al-Si Framework
  (76.2)Feldspathoids and related species
  (76.2.4)Helvite group
 
76.2.4.1 Helvite Mn4Be3(SiO4)3S P 43n 4 3m
 
76.2.4.2 Danalite Fe4Be3(SiO4)3S P 43n 4 3m
 
76.2.4.3 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m
Help on  Strunz Class: Strunz Class: VIII/J.12-10 VIII - Silicates
  VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders
  VIII/J.12 - Sodalite group, Danalite - Genthelvite series
 
VIII/J.12-10 Danalite Fe4Be3(SiO4)3S P 43n 4 3m
 
VIII/J.12-20 Helvite Mn4Be3(SiO4)3S P 43n 4 3m
 
VIII/J.12-30 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m
 

Other Danalite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Danalite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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

Danalite

Fe++4Be3(SiO4)3S
Dana No: 76.2.4.2 Strunz No: VIII/J.12-10
Locality:

 

Notes:

 

 
   
 
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