Brazilianite Mineral Data

General Brazilianite Information

Chemical Formula:

NaAl3(PO4)2(OH)4

Composition:

Molecular Weight = 361.91 gm

Sodium 6.35 % Na 8.56 % Na₂O

Aluminum 22.37 % Al 42.26 % Al₂O₃

Phosphorus 17.12 % P 39.22 % P₂O₅

Hydrogen 1.11 % H 9.96 % H₂O

Oxygen 53.05 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl₃(PO₄)₂(OH)₄

IMA Status:

Valid Species (Pre-IMA) 1945

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after its first discovery in Brazil.

Name Pronunciation:

Brazilianite + Pronunciation

Synonym:

ICSD 2086

PDF 42-1354

Brazilianite Image

Images:

Brazilianite

Comments: Gemmy brazilianite crystal.
Location: Marcel Telirio mine, Divino das Laranjeiras, Minas Gerais, Brazil. Scale: Size Not Given.
© Fabre Minerals

Brazilianite Crystallography

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

By Intensity(I/I_o): 5.05(1), 2.74(0.8), 2.99(0.8),

Forms:

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Forms: ( 3 0 1) ( 1 1 0) ( 0 1 0) ( 1 2 1) ( 1 0 1) ( 2 1 0) ( 1 0 0) ( 1 1 1) ( 0 1 1) ( 0 0 1)

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Physical Properties of Brazilianite

Color:

Colorless, Greenish yellow, Yellow green, Light yellow.

Optical Properties of Brazilianite

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.201,KPDmeas= 0.205,KC= 0.2094
Ncalc = 1.62 - 1.64

Calculated Properties of Brazilianite

Electron Density:

Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Brazilianite =2.98 gm/cc.

Fermion Index:

Fermion Index = 0.0002563129
Boson Index = 0.9997436871

Photoelectric:

PE_Brazilianite= 1.59 barns/electron
U=PE_Brazilianite x rElectron Density= 4.72 barns/cc.

Radioactivity:

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

Brazilianite Classification

Dana Class:

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

(41.05)where (A B)2 (XO4) Zq

(41.05.07)Dana Group

41.05.07.01 Brazilianite NaAl3(PO4)2(OH)4 P 2₁/n 2/m

Strunz Class:

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

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

08.BK -With medium-sized and large cations, (OH, etc.)

08.BK.05 Brazilianite NaAl3(PO4)2(OH)4 P 2₁/n 2/m

Other Brazilianite Information

See Also:

Links to other databases for Brazilianite :
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 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Tradeshop.com - The Rainbow of Gems
16 - WWW-MINCRYST

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Ask about Brazilianite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Brazilianite

NaAl3(PO4)2(OH)4
Dana No: 41.05.07.01 Strunz No: 08.BK.05
Locality:

Notes:

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