Tyrolite Mineral Data

General Tyrolite Information

Chemical Formula:

CaCu5(AsO4)2(CO3)(OH)4•6(H2O)

Composition:

Molecular Weight = 871.78 gm

Calcium 4.60 % Ca 6.43 % CaO

Copper 36.45 % Cu 41.03 % Cu₂O

Arsenic 17.19 % As 26.36 % As₂O₅

Hydrogen 1.85 % H 16.53 % H₂O

Carbon 1.38 % C 5.05 % CO₂

Oxygen 38.54 % O

______ ______

100.00 % 95.41 % = TOTAL OXIDE

Empirical Formula:

CaCu₅(AsO₄)₂(CO₃)(OH)₄•6(H₂O)

Environment:

Secondary copper mineral found with other arsenates and sulfates.

IMA Status:

Valid Species (Pre-IMA) 1845

Locality:

Brixlegg-Schwaz District, Innsbruck, Tyrol, Austria. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Tyrolite

Synonym:

Tirolit

Tyrolite Image

Images:

Tyrolite

Comments: Blue, crystalline aggregates of tyrolite on matrix.
Location: Lake Serene mine, Index, Snohomish County, Washington, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Tyrolite

Comments: Blue-green flattened, felted, platy crystals of tyrolite to 3mm on matrix.
Location: Centennial Eureka mine, Juab Co., Utah, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Tyrolite Crystallography

Axial Ratios:

a:b:c =0.1839:1:0.1009

Cell Dimensions:

a = 10.212, b = 55.51, c = 5.602, Z = 4; V = 3,175.60 Den(Calc)= 1.82

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmma

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

By Intensity(I/I_o): 28(1), 2.998(0.8), 14.1(0.8),

Crystal Structure:

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Krivovichev S V , Chernyshov D Y , Dobelin N , Armbruster T , Kahlenberg V , Kaindl R , Tessadri R , Kaltenhauser G , American Mineralogist , 91 (2006) p.1378-1384, Crystal chemistry and polytypism of tyrolite, Sample: Brixlegg, Schwaz, Tyrol, Austria, Note: Tyrolite-1M polytype

Physical Properties of Tyrolite

Cleavage:

{001} Perfect

Color:

Blue, Blue green, Green blue, Light green.

Density:

3.1 - 3.2, Average = 3.15

Diaphaneity:

Translucent

Fracture:

Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.

Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Streak:

pale blue

Optical Properties of Tyrolite

Gladstone-Dale:

CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.797 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3938,KPDmeas= 0.2275,KC= 0.2191
Ncalc = 1.4 - 1.7

Optical Data:

Biaxial (-), a=1.694, b=1.726, g=1.73, bire=0.0360, 2V(Calc)=38, 2V(Meas)=36. Dispersion relatively strong.

Calculated Properties of Tyrolite

Electron Density:

Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Tyrolite =3.15 gm/cc.

Fermion Index:

Fermion Index = 0.0004013864
Boson Index = 0.9995986136

Photoelectric:

PE_Tyrolite= 28.07 barns/electron
U=PE_Tyrolite x rElectron Density= 85.39 barns/cc.

Radioactivity:

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

Tyrolite Classification

Dana Class:

42.04.03.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.04)where (AB)5 (XO4)2 Zq · x(H2O)

(42.04.03)Dana Group

42.04.03.01 Tyrolite CaCu5(AsO4)2(CO3)(OH)4•6(H2O) Pmma 2/m 2/m 2/m

Strunz Class:

08.DM.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DM -With large and medium-sized cations, (OH, etc.):RO4 > 2:1

08.DM.10 Clinotyrolite Ca2Cu9[(As,S)O4]4(OH)10•10(H2O) P 2/a 2/m

08.DM.10 Tyrolite CaCu5(AsO4)2(CO3)(OH)4•6(H2O) Pmma 2/m 2/m 2/m

Other Tyrolite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Tyrolite :
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

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Ask about Tyrolite 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 Tyrolite Specimen Label here :

Tyrolite

CaCu5(AsO4)2(CO3)(OH)4•6(H2O)
Dana No: 42.04.03.01 Strunz No: 08.DM.10
Locality:

Notes: