Theophrastite Mineral Data (original) (raw)

General Theophrastite Information

Help on Chemical Formula: Chemical Formula:

Ni(OH)2

Help on Composition: Composition:

Molecular Weight = 92.70 gm

Nickel 63.31 % Ni 80.57 % NiO

Hydrogen 2.17 % H 19.43 % H2O

Oxygen 34.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ni(OH)2

Help on Environment: Environment:

Coatings in chromitite in lenses in serpentinites (

Help on IMA Status: IMA Status:

Approved IMA 1981

Help on Locality: Locality:

Verrnion district, 50 km west of Thessalonike, Macedonia, Greece. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for Theophrastus, (ca. 371 BC-ca. 287 BC), the first Greek mineralogist.

Help on Name Pronunciation: Name Pronunciation:

Theophrastite + Pronunciation Say THEOPHRASTITE

Help on Synonym: Synonym:

ICSD 28101

PDF 14-117

Theophrastite Image

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

Theophrastite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.47173

Help on Cell Dimensions: Cell Dimensions:

a = 3.131, c = 4.608, Z = 1; V = 39.12 Den(Calc)= 3.93

Help on Crystal System: Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: P 3m1

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.335(1), 4.61(0.95), 1.755(0.5),

Click Here for Large Theophrastite 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

| | Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium iodide structure | | ------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Theophrastite

Help on Color: Color:

Emerald green.

Help on Density: Density:

4

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Help on Hardness: Hardness:

3.5 - Copper Penny

Help on Luster: Luster:

Vitreous (Glassy)

Help on Streak: Streak:

light green

Optical Properties of Theophrastite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.07 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1933,KPDmeas= 0.1899,KC= 0.2079
Ncalc = 1.82 - 1.83

Help on Optical Data: Optical Data:

Uniaxial (+), w=1.759-1.76, e=1.759-1.76, bire=0.0000.

Calculated Properties of Theophrastite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Theophrastite =3.93 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0073228105
Boson Index = 0.9926771895

Help on Photoelectric: Photoelectric:

PETheophrastite = 24.82 barns/electron
U=PETheophrastite x rElectron Density= 96.81 barns/cc.

Help on Radioactivity: Radioactivity:

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

Theophrastite Classification

Help on Dana Class: Dana Class:

06.02.01.05 (06)Hydroxides and Oxides Containing Hydroxyl

(06.02)where X++ (OH)2

(06.02.01)Brucite group (Rhombohedral: P-3m1)

06.02.01.01 Brucite Mg(OH)2 P 3m1 3 2/m

06.02.01.02 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m

06.02.01.03 Pyrochroite Mn(OH)2 P 3m1 3 2/m

06.02.01.04 Portlandite Ca(OH)2 P 3m1 3 2/m

06.02.01.05 Theophrastite Ni(OH)2 P 3m1 3 2/m

Help on Strunz Class: Strunz Class:

04.FE.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra

04.FE.05 Amakinite (Fe,Mg)(OH)2 P 3m1 3 2/m

04.FE.05 Brucite Mg(OH)2 P 3m1 3 2/m

04.FE.05 Portlandite Ca(OH)2 P 3m1 3 2/m

04.FE.05 Pyrochroite Mn(OH)2 P 3m1 3 2/m

04.FE.05 Theophrastite Ni(OH)2 P 3m1 3 2/m

04.FE.05 Fougerite! (Fe,Mg)6Fe2(OH)18•4(H2O) R 3m 3 2/m

Other Theophrastite Information

Help on References: References:

NAME( AntBidBlaNic3) 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 Theophrastite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

Search for Theophrastite using:

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

Visit our Advertisers for Theophrastite :

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

Ask about Theophrastite 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 Theophrastite Specimen Label here :

Theophrastite

Ni(OH)2
Dana No: 06.02.01.05 Strunz No: 04.FE.05
Locality:

Notes: