Goyazite Mineral Data (original) (raw)

General Goyazite Information

Help on Chemical Formula: Chemical Formula:

SrAl3(PO4)2(OH)5•(H2O)

Help on Composition: Composition:

Molecular Weight = 461.56 gm

Strontium 18.98 % Sr 22.45 % SrO

Aluminum 17.54 % Al 33.14 % Al2O3

Phosphorus 13.42 % P 30.75 % P2O5

Hydrogen 1.53 % H 13.66 % H2O

Oxygen 48.53 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

SrAl3(PO4)2(OH)5•(H2O)

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1884

Help on Locality: Locality:

Serra de Congonhas, Diamantina, Minas Gerais, Brazil Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after the province of Goyaz, Brazil.

Help on Name Pronunciation: Name Pronunciation:

Goyazite Say GOYAZITE

Help on Synonym: Synonym:

Bowmanite

Hamlinite

ICSD 68170

Lusungite

PDF 34-152

Goyazite Image

Click Here for Larger Goyazite Image in a New Browser Window Images:

Goyazite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:2.36363

Help on Cell Dimensions: Cell Dimensions:

a = 7.0218, c = 16.597, Z = 3; V = 708.69 Den(Calc)= 3.24

Help on Crystal System: Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.965(1), 5.704(0.65), 2.209(0.45),

Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
- Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

| | Forms:( 0 2 1) ( 0 1 1) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Goyazite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

| | Kato T , Mineralogical Journal , 13 (1987) p.390-396, Further refinement of the goyazite structure, Locality: Palermo mine, North Groton, New Hampshire, USA | | --------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Goyazite

Help on Cleavage: Cleavage:

{0001} Perfect

Help on Color: Color:

Lemon yellow, Pink, Colorless.

Help on Density: Density:

3.16 - 3.28, Average = 3.22

Help on Diaphaneity: Diaphaneity:

Transparent

Help on Fracture: Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Help on Habit: Habit:

Blocky - Rhombohedral - Crystal shape resembles rhomohedrons.

Help on Habit: Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Help on Hardness: Hardness:

4-5 - Fluorite-Apatite

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous - Greasy

Help on Magnetism: Magnetism:

Nonmagnetic

Help on Streak: Streak:

white

Optical Properties of Goyazite

Help on Dichroism (e): Dichroism (e):

none.

Help on Dichroism (w): Dichroism (w):

none.

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1929,KPDmeas= 0.1941,KC= 0.2039
Ncalc = 1.64 - 1.67

Help on Optical Data: Optical Data:

Uniaxial (+), w=1.62, e=1.63, bire=0.0100.

Calculated Properties of Goyazite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Goyazite =3.22 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Help on Photoelectric: Photoelectric:

PEGoyazite = 21.69 barns/electron
U=PEGoyazite x rElectron Density= 68.39 barns/cc.

Help on Radioactivity: Radioactivity:

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

Goyazite Classification

Help on Dana Class: Dana Class:

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

(42.07)where (AB)5 (XO4)3 Zq � x(H2O)

(42.07.03)Crandallite Group

42.07.03.01 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.02 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m

42.07.03.03 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.04 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m

42.07.03.05 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

42.07.03.06 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m

42.07.03.07 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

42.07.03.08 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

Help on Strunz Class: Strunz Class:

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

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

08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1

08.BL.10 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m

08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m

08.BL.10 Ferrazite? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri

08.BL.10 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m

08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m

08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 3 2/m

08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m

08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m

08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m

08.BL.10 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m

08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig

08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m

08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m

08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m

Other Goyazite Information

Help on References: References:

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

Help on See Also: See Also:

Links to other databases for Goyazite :
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

Search for Goyazite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Goyazite :

A Bijoux Google Search for Goyazite
Adam's Minerals Google Search for Goyazite
Cape Minerals Google Search for Goyazite
Dakota Matrix Minerals Google Search for Goyazite
Excalibur Mineral Corp. Google Search for Goyazite
Exceptional Minerals Google Search for Goyazite
John Betts Fine Minerals Search for Goyazite
McDougall Minerals Google Search for Goyazite
Mineral News Website Link
Rock and Mineral Shows Google Search for Goyazite
Weinrich Minerals, Inc. Google Search for Goyazite

Ask about Goyazite 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 Espa�ol

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

Goyazite

SrAl3(PO4)2(OH)5•(H2O)
Dana No: 42.07.03.03 Strunz No: 08.BL.10
Locality:

Notes: