Berlinite Mineral Data

Berlinite Mineral Data +

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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.

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.

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:

Berlinite Lacroixite

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 - TrapezohedralH-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),

Crystal Structure:

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Muraoka Y , Kihara K , Physics and Chemistry of Minerals , 24 (1997) p.243-253, The temperature dependence of the crystal structure of berlinite,, a quartz-type form of AlPO4, Sample: T = 25 C

View Additional jPOWD Structure files for Berlinite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Berlinite

Cleavage:

None

Color:

Colorless, Gray, Gray pink, Light pink.

Density:

2.64

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Berlinite

Electron Density:

r_electron=2.62 gm/cc
note: r_Berlinite=2.66 gm/cc.

Fermion Index

Fermion Index = 0.00025
Boson Index = 0.99975

Photoelectric:

PE_Berlinite= 1.86 barns/electron
U=PE_Berlinite x r_electron= 4.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Berlinite is Not Radioactive

Berlinite Classification

Dana Class:

38.4.2.1 (38)Anhydrous Phosphates, etc

(38.4)A+ XO4

(38.4.2)Dana Group

38.4.2.1 Berlinite AlPO4 P 3₁21,P 3₂21 3 2

38.4.2.2 Alarsite! AlAsO4 P 3₁21,P 3₂21 3 2

38.4.2.3 Rodolicoite! FePO4 R 3121 3 2

Strunz Class:

VII/A.01-10 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of small size: Li, Be, Al

VII/A.01 - Berlinite - Beryllonite - Hurlbutite series

VII/A.01-10 Berlinite AlPO4 P 3₁21,P 3₂21 3 2

VII/A.01-12 Alarsite! AlAsO4 P 3₁21,P 3₂21 3 2

VII/A.01-15 Rodolicoite! FePO4 R 3121 3 2

VII/A.01-20 Lithiophosphate Li3PO4 P mn2₁ mm2

VII/A.01-25 Nalipoite NaLi2PO4 Pmnb 2/m 2/m 2/m

VII/A.01-30 Beryllonite NaBePO4 P 2₁/n 2/m

VII/A.01-40 Hurlbutite CaBe2(PO4)2 P 2₁/a 2/m

Other Berlinite Information

References:

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

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

Berlinite

AlPO4
Dana No: 38.4.2.1 Strunz No: VII/A.01-10
Locality:

Notes: