Genthelvite Mineral Data (original) (raw)

General Genthelvite Information

Help on Chemical Formula: Chemical Formula:

Zn4Be3(SiO4)3S

Help on Composition: Composition:

Molecular Weight = 596.91 gm

Beryllium 4.53 % Be 12.57 % BeO

Zinc 43.82 % Zn 54.54 % ZnO

Silicon 14.12 % Si 30.20 % SiO2

Sulfur 5.37 % S 5.37 % S2-

- % S -2.68 % -O=S

Oxygen 32.16 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Zn4Be3(SiO4)3S

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1944

Help on Locality: Locality:

Cheyenne Canyon, El Paso County, Colorado, USA Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Frederick August Ludwig Karl Genth (1820-1893), German-American mineralogist.

Help on Name Pronunciation: Name Pronunciation:

Genthelvite + Pronunciation Say GENTHELVITE

Help on Synonym: Synonym:

ICSD 201641

PDF 38-467

Genthelvite Image

Click Here for Larger Genthelvite Image in a New Browser Window Images:

Genthelvite Crystallography

Help on Cell Dimensions: Cell Dimensions:

a = 8.1206, Z = 2; V = 535.51 Den(Calc)= 3.70

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): 1.918(1), 2.174(1), 3.33(1),

Click Here for Large Genthelvite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | 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 Genthelvite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Genthelvite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Blue green, Brown, Colorless, Green, Yellow.

Help on Density: Density:

3.62

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Help on Hardness: Hardness:

6-6.5 - Orthoclase-Pyrite

Help on Luminescence: Luminescence:

Phosphorescent fluorescent, Short UV=green, Long UV=green.

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

white

Optical Properties of Genthelvite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.146 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.122 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2009,KPDmeas= 0.2054,KC= 0.1792
Ncalc = 1.65 - 1.66

Help on Optical Data: Optical Data:

Isotropic, n=1.742-1.745.

Calculated Properties of Genthelvite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.55 gm/cc
note: Specific Gravity of Genthelvite =3.70 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Help on Photoelectric: Photoelectric:

PEGenthelvite = 22.74 barns/electron
U=PEGenthelvite x rElectron Density= 80.63 barns/cc.

Help on Radioactivity: Radioactivity:

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

Genthelvite Classification

Help on Dana Class: Dana Class:

76.02.04.03 (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 43n 4 3m

76.02.04.02 Danalite Fe4Be3(SiO4)3S P 43n 4 3m

76.02.04.03 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m

Help on Strunz Class: 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 43m 4 3m

09.FB.10 Danalite Fe4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Hauyne (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2 P 43n 4 3m

09.FB.10 Genthelvite Zn4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Helvite Mn4Be3(SiO4)3S P 43n 4 3m

09.FB.10 Lazurite Na3Ca(Al3Si3O12)S P 43n 4 3m

09.FB.10 Kamaishilite Ca2Al2SiO6(OH)2 I-lattice Tetra

09.FB.10 Nosean Na8Al6Si6O24(SO4) P 43m 4 3m

09.FB.10 Sodalite Na8Al6Si6O24Cl2 P 43n 4 3m

09.FB.10 Tugtupite Na4AlBeSi4O12Cl I 4 4

09.FB.10 Tsaregorodtsevite N(CH3)4AlSi5O12 I 222 2 2 2

Other Genthelvite Information

Help on References: References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;www.saint-hilaire.ca) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Genthelvite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - CalTech Mineral Spectroscopy
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

Search for Genthelvite using:

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

Visit our Advertisers for Genthelvite :

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

Ask about Genthelvite 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 Espa�ol

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

Genthelvite

Zn4Be3(SiO4)3S
Dana No: 76.02.04.03 Strunz No: 09.FB.10
Locality:

Notes: