Trogtalite Mineral Data

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Trogtalite Information

Chemical Formula:

CoSe2

Composition:

Molecular Weight = 216.85 gm

Cobalt 27.18 % Co

Selenium 72.82 % Se

______

100.00 %

Empirical Formula:

CoSe₂

Environment:

Intergrown with clausthalite. Dimorphous with hastite.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Steinbruch Trogtal quarry, Lautenthal, Harz,, Germany Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Trogtalite + Pronunciation

Synonym:

ICSD 40331

PDF 9-234

Trogtalite Image

Images:

Trogtalite

Comments: Polished section (PPL). Grains of anhedral trogtalite (Tgt) partly replaced by a veinlet of sulfur-bearing berzelianite (Brz) in malachite-cemented (Mal) quartz (Qtz). (CanMin, v46:219).
Location: Thrust-Slice '2400' of the Musonoi Extension mine, Katanga, Democratic Republic of Congo. Scale: See Image.
© Canadian Mineralogist

Trogtalite Crystallography

Cell Dimensions:

a = 5.87, Z = 4; V = 202.26 Den(Calc)= 7.12

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.39(1), 2.62(1), 1.765(0.9),

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

Furuseth S , Kjekshus A , Andresen A F , Acta Chemica Scandinavica , 23 (1969) p.2325-2334, On the magnetic properties of CoSe2, NiS2, and NiSe2, Locality: synthetic

Physical Properties of Trogtalite

Color:

Pink violet.

Diaphaneity:

Opaque

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

7 - Quartz

Luster:

Metallic

Optical Properties of Trogtalite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Trogtalite in Air**
λ	R	∑ R(λ)
400 nm	42.50
420 nm	42.20
440 nm	41.90
460 nm	41.40
480 nm	41.00
500 nm	40.80
520 nm	41.10
540 nm	41.30
560 nm	42.00
580 nm	42.60
600 nm	43.30
620 nm	43.90
640 nm	44.50
660 nm	45.20
680 nm	45.60
700 nm	45.80

**Calculated Relative Intensity Colors of Trogtalite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R

Calculated Properties of Trogtalite

Electron Density:

Bulk Density (Electron Density)=6.24 gm/cc
note: Specific Gravity of Trogtalite =7.12 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_Trogtalite= 68.46 barns/electron
U=PE_Trogtalite x rElectron Density= 427.04 barns/cc.

Radioactivity:

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

Trogtalite Classification

Dana Class:

02.12.01.05 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.01)Pyrite Group (Isometric: Pa3)

02.12.01.01 Pyrite FeS2 P a3 2/m 3

02.12.01.02 Vaesite NiS2 P a3 2/m 3

02.12.01.03 Cattierite CoS2 P a3 2/m 3

02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.12.01.05 Trogtalite CoSe2 P a3 2/m 3

02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3

02.12.01.08 Krutaite CuSe2 P a3 2/m 3

02.12.01.09 Hauerite MnS2 P a3 2/m 3

02.12.01.10 Laurite RuS2 P a3 2/m 3

02.12.01.11 Aurostibite AuSb2 P a3 2/m 3

02.12.01.12 Krutovite NiAs2 P a3 2/m 3

02.12.01.13 Sperrylite PtAs2 P a3 2/m 3

02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.12.01.16 Erlichmanite OsS2 P a3 2/m 3

02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3

02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3

02.12.01.19 Mayingite IrBiTe P a3 2/m 3

Strunz Class:

02.EB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.E - Metal Sulfides, M:S £ 1:2

02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.

02.EB.05a Aurostibite AuSb2 P a3 2/m 3

02.EB.05a Cattierite CoS2 P a3 2/m 3

02.EB.05a Hauerite MnS2 P a3 2/m 3

02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3

02.EB.05a Dzharkenite FeSe2 P a3 2/m 3

02.EB.05a Erlichmanite OsS2 P a3 2/m 3

02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3

02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3

02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3

02.EB.05a Laurite RuS2 P a3 2/m 3

02.EB.05a Krutaite CuSe2 P a3 2/m 3

02.EB.05a Pyrite FeS2 P a3 2/m 3

02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3

02.EB.05a Sperrylite PtAs2 P a3 2/m 3

02.EB.05a Vaesite NiS2 P a3 2/m 3

02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3

02.EB.05a Trogtalite CoSe2 P a3 2/m 3

Other Trogtalite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Trogtalite :
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 Trogtalite using:

[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Trogtalite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Trogtalite Mineral Data :

Ask about Trogtalite 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 Trogtalite Specimen Label here :

Trogtalite

CoSe2
Dana No: 02.12.01.05 Strunz No: 02.EB.05a
Locality:

Notes: