Danalite Mineral Data
General Danalite Information
Chemical Formula:
Fe++4Be3(SiO4)3S
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
Empirical Formula:
Fe2+ 4 Be3 (SiO4 )3 S
IMA Status:
Valid Species (Pre-IMA) 1866
Locality:
Essex Co., Massachusetts, USA. Link to MinDat.org Location Data.
Name Origin:
Named after James Dwight Dana (1813-1895), American mineralogist and author of the Dana mineral classification.
Name Pronunciation:
Danalite
Synonym:
ICSD 201639
PDF 11-491
Danalite Image
Images:
Danalite
Comments: Orange irregular gemmy danalite in matrix.
Location: Iron Mountain, Winston, New Mexico, USA.
Scale: See Image.
© Rruff Database
Danalite Crystallography
Cell Dimensions:
a = 8.17, Z = 2; V = 545.34 Den(Calc)= 3.40
Crystal System:
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: P 4 3n
X Ray Diffraction:
By Intensity(I/Io ): 3.35(1), 1.932(0.7), 2.193(0.5),
Physical Properties of Danalite
Cleavage:
{111} Indistinct
Color:
Brown, Brownish black, Grayish yellow, Pink, Reddish brown.
Density:
3.43
Diaphaneity:
Transparent to Translucent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Streak:
gray white
Optical Properties of Danalite
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 Ncalc = 1.67
Optical Data:
Isotropic, n=1.753-1.771.
Calculated Properties of Danalite
Electron Density:
Bulk Density (Electron Density)=3.31 gm/cc note: Specific Gravity of Danalite =3.43 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PEDanalite = 12.95 barns/electronU=PEDanalite x r Electron Density= 42.94 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Danalite is Not Radioactive
Danalite Classification
Dana Class:
76.02.04.02 (76) Tectosilicate Al-Si Framework
(76.02) Feldspathoids and related species
(76.02.04) Helvite group
76.02.04.01 Helvite Mn4Be3(SiO4)3S P 4 3n 4 3m
76.02.04.02 Danalite Fe4Be3(SiO4)3S P 4 3n 4 3m
76.02.04.03 Genthelvite Zn4Be3(SiO4)3S P 4 3n 4 3m
Strunz Class:
09.FB.10 09 - SILICATES (Germanates)
09.F - Tektosilicates without Zeolitic H2O
09.FB -Tektosilicates with additional anions
09.FB.10 Bicchulite Ca2Al2SiO6(OH)2 I 4 3m 4 3m
09.FB.10 Danalite Fe4Be3(SiO4)3S P 4 3n 4 3m
09.FB.10 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 4 3n 4 3m
09.FB.10 Genthelvite Zn4Be3(SiO4)3S P 4 3n 4 3m
09.FB.10 Helvite Mn4Be3(SiO4)3S P 4 3n 4 3m
09.FB.10 Lazurite Na3Ca(Al3Si3O12)S P 4 3n 4 3m
09.FB.10 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra
09.FB.10 Nosean Na8Al6Si6O24(SO4) P 4 3m 4 3m
09.FB.10 Sodalite Na8Al6Si6O24Cl2 P 4 3n 4 3m
09.FB.10 Tugtupite Na4AlBeSi4O12Cl I 4 4
09.FB.10 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2
Other Danalite Information
References:
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Danalite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
Search for Danalite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Danalite :
Ask about Danalite 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
Espaņol
Print or Cut-and-Paste your Danalite Specimen Label here :
Danalite
Fe++4Be3(SiO4)3S
Dana No: 76.02.04.02 Strunz No: 09.FB.10
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.