Berlinite Mineral Data

General Berlinite Information

Chemical Formula:

AlPO4

Composition:

Molecular Weight = 121.95 gm

Aluminum 22.12 % Al 41.80 % Al₂O₃

Phosphorus 25.40 % P 58.20 % P₂O₅

Oxygen 52.48 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Al(PO₄)

Environment:

A rare high-temperature hydrothermal or metasomatic mineral. Often found in caves after guano fires.

IMA Status:

Valid Species (Pre-IMA) 1868

Locality:

In the Vastana mine, near Nasum, Skane, and at Halsjoberg, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Honoring Professor Nils Johan Berlin (1812-1891), pharmacologist, University of Lund, Lund, Sweden.

Name Pronunciation:

Berlinite + Pronunciation

Synonym:

ICSD 9461

PDF 10-423

Berlinite Image

Images:

Berlinite Trolleite

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:

Lacroixite Berlinite

Comments: Pale olive green crystalline lacroixite with white crystalline berlinite.
Location: Rusororo Pegmatite, Gatumba, Gisenyi, Rwanda. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Berlinite Crystallography

Axial Ratios:

a:c = 1:2.21747

Cell Dimensions:

a = 4.92, c = 10.91, Z = 3; V = 228.71 Den(Calc)= 2.66

Crystal System:

Trigonal - Trapezohedral H-M Symbol (3 2) Space Group: P 3₁21,P 3₂21

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

By Intensity(I/I_o): 3.369(1), 4.28(0.25), 1.835(0.16),

Physical Properties of Berlinite

Cleavage:

None

Color:

Colorless, Gray, Gray pink, Light pink.

Density:

2.64

Diaphaneity:

Transparent to Translucent

Fracture:

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

Hardness:

6.5 - Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Berlinite

Gladstone-Dale:

CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1978,KPDmeas= 0.1993,KC= 0.193
Ncalc = 1.51

Optical Data:

Uniaxial (+), w=1.5235, e=1.529, bire=0.0055.

Calculated Properties of Berlinite

Electron Density:

Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Berlinite =2.66 gm/cc.

Fermion Index:

Fermion Index = 0.0002518911
Boson Index = 0.9997481089

Photoelectric:

PE_Berlinite= 1.86 barns/electron
U=PE_Berlinite x rElectron Density= 4.88 barns/cc.

Radioactivity:

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

Berlinite Classification

Dana Class:

38.04.02.01 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.02)Berlinite Group

38.04.02.01 Berlinite AlPO4 P 3₁21,P 3₂21 3 2

38.04.02.02 Alarsite! AlAsO4 P 3₁21,P 3₂21 3 2

38.04.02.03 Rodolicoite! FePO4 R 3121 3 2

Strunz Class:

08.AA.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AA -With small cations (some also with larger ones)

08.AA.05 Alarsite! AlAsO4 P 3₁21,P 3₂21 3 2

08.AA.05 Berlinite AlPO4 P 3₁21,P 3₂21 3 2

08.AA.05 Rodolicoite! FePO4 R 3121 3 2

Other Berlinite 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 Berlinite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Print or Cut-and-Paste your Berlinite Specimen Label here :

Berlinite

AlPO4
Dana No: 38.04.02.01 Strunz No: 08.AA.05
Locality:

Notes:

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