Tillmannsite Mineral Data

Tillmannsite Mineral Data

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Tillmannsite Information

Chemical Formula:

(Ag3Hg)(V,As)O4

Composition:

Molecular Weight = 20106.29 gm

Vanadium 0.17 % V 0.30 % V₂O₅

Silver 1.60 % Ag 1.72 % Ag₂O

Mercury 97.77 % Hg 101.67 % Hg₂O

Arsenic 0.13 % As 0.21 % As₂O₅

Oxygen 0.33 % O

______ ______

100.00 % 103.89 % = TOTAL OXIDE

Empirical Formula:

Ag_2.98Hg₉₈(VO₄)_0.67(AsO₄)_0.36

Environment:

Supergene product in small geodes in mixed carbonate gangue.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Old copper mines at Roua, Alpes-Maritimes, France. Link to MinDat.org Location Data.

Name Origin:

Named for Ekkhart Tillmanns (1941-) of the Institute of Mineralogy and Crystallography, Wien, Austria.

Synonym:

IMA2001-010

Search for Tillmannsite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Tillmannsite Crystallography

Axial Ratios:

a:c = 1:0.60152

Cell Dimensions:

a = 7.727, c = 4.648, Z = 2; V = 277.52 Den(Calc)= 240.60

Crystal System:

Tetragonal - DisphenoidalH-M Symbol (4) Space Group: I 4

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

By Intensity(I/I_o): 2.735(1), 2.772(1)(100,211), 2.324(0.3)(002),5.45(0.25)(110), 2.254(0.2)(301), 1.683(0.15)(312), 1.74(0.15)(411),

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

Sarp H , Pushcharovsky D Y , MacLean E J , Teat S J , Zubkova N V , European Journal of Mineralogy , 15 (2003) p.177-180, Tillmannsite, (Ag3Hg)(V,As)O4, a new mineral: its description and, crystal structure

Physical Properties of Tillmannsite

Cleavage:

None

Color:

Red, Brownish red.

Diaphaniety:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Pseudo Octohedral - Crystals show an octohedral outline.

Luster:

Adamantine

Streak:

brownish red

Optical Properties of Tillmannsite

Gladstone-Dale:

CI calc= 0.961 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.0058,KC= 0.1507

Optical Data:

Uniaxial (+), w=2.3, e=2.5, bire=0.2000.

Calculated Properties of Tillmannsite

Fermion Index

Fermion Index = 0.29526
Boson Index = 0.70474

Photoelectric:

PE_Tillmannsite=1,734.95 barns/electron
U=PE_Tillmannsite x r_electron= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tillmannsite is Not Radioactive

Tillmannsite Classification

Dana Class:

38.3.11.1 (38)Anhydrous Phosphates, etc

(38.3)(A+ B++)3 (XO4)2

(38.3.11)Dana Group

38.3.11.1 Tillmannsite ! (Ag3Hg)(V,As)O4 I 4 4

Strunz Class:

VII/A.11-05 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.11 - Chursinite series

VII/A.11-05 Tillmannsite (Ag3Hg)(V,As)O4 I 4 4

VII/A.11-10 Chursinite HgHg(AsO4) P 2₁/c 2/m

Other Tillmannsite Information

References:

NAME( AmMin, v 88, p 1839) PHYS. PROP.(AmMin, v 88, p 1839) OPTIC PROP.(AmMin, v 88, p 1839)

See Also:

Links to other databases for Tillmannsite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

Search for Tillmannsite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tillmannsite :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

T G Fine Minerals

Wrights Rock Shop

Translate Tillmannsite Mineral Data :

Ask about Tillmannsite 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 Tillmannsite Specimen Label here :

Tillmannsite

(Ag3Hg)(V,As)O4
Dana No: 38.3.11.1 Strunz No: VII/A.11-05
Locality:

Notes: