Trolleite Mineral Data

General Trolleite Information

Chemical Formula:

Al4(PO4)3(OH)3

Composition:

Molecular Weight = 443.86 gm

Aluminum 24.32 % Al 45.94 % Al₂O₃

Phosphorus 20.93 % P 47.97 % P₂O₅

Hydrogen 0.68 % H 6.09 % H₂O

Oxygen 54.07 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al₄(PO₄)₃(OH)₃

Environment:

Amphibolite-grade metamorphic rocks.

IMA Status:

Valid Species (Pre-IMA) 1868

Locality:

Vastana mine, near Nasum, Skane, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Hans Gabriel Trolle-Wachtmeister (1782-1871), Swedish chemist.

Name Pronunciation:

Trolleite + Pronunciation

Synonym:

ICSD 6193

PDF 42-1352

Trolleite Image

Images:

Trolleite Berlinite

Comments: Pinkish crystalline berlinite with blue trolleite.
Location: Ijzer Mine, Vestana, Christiansted, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Trolleite Lazulite

Comments: Pale blue trolleite with darker blue lazulite.
Location: Champion Mine, White Mountains, Mono County, California. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Trolleite Viseite

Comments: Chalky white massive viseite with bluish trolleite.
Location: Champion Sillimanite Mine, near Laws, Mono County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Trolleite Crystallography

Axial Ratios:

a:b:c =2.6384:1:1.0001

Cell Dimensions:

a = 18.894, b = 7.161, c = 7.162, Z = 4; beta = 99.99° V = 954.33 Den(Calc)= 3.09

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/c

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

By Intensity(I/I_o): 3.208(1), 3.095(0.9), 3.075(0.5),

Crystal Structure:

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Moore P B , Araki T , American Mineralogist , 59 (1974) p.974-984, Trolleite, Al4(OH)3[PO4]3: A very dense structure with octahedral, face-sharing dimers

Physical Properties of Trolleite

Cleavage:

{???} Indistinct

Color:

Light blue, Light green.

Density:

3.09

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Trolleite

Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2051,KPDmeas= 0.2051,KC= 0.2036
Ncalc = 1.63

Optical Data:

Biaxial (-), a=1.619, b=1.639, g=1.643, bire=0.0240, 2V(Calc)=46, 2V(Meas)=49.

Calculated Properties of Trolleite

Electron Density:

Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Trolleite =3.09 gm/cc.

Fermion Index:

Fermion Index = 0.0002605521
Boson Index = 0.9997394479

Photoelectric:

PE_Trolleite= 1.72 barns/electron
U=PE_Trolleite x rElectron Density= 5.28 barns/cc.

Radioactivity:

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

Trolleite Classification

Dana Class:

41.11.01.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.11)with miscellaneous formulae

(41.11.01)Dana Group

41.11.01.01 Trolleite Al4(PO4)3(OH)3 I2/c 2/m

Strunz Class:

08.BB.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BB -With only medium-sized cations, (OH, etc.):RO4 £ 1:1

08.BB.45 Trolleite Al4(PO4)3(OH)3 I2/c 2/m

Other Trolleite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Trolleite :
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

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Ask about Trolleite here :
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Print or Cut-and-Paste your Trolleite Specimen Label here :

Trolleite

Al4(PO4)3(OH)3
Dana No: 41.11.01.01 Strunz No: 08.BB.45
Locality:

Notes: