Pretulite Mineral Data

General Pretulite Information

Chemical Formula:

ScPO4

Composition:

Molecular Weight = 139.93 gm

Scandium 32.13 % Sc 49.28 % Sc₂O₃

Phosphorus 22.14 % P 50.72 % P₂O₅

Oxygen 45.74 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Sc(PO₄)

Environment:

In lazulite-quartz veins in phyllite-micaschist. The scandium dominant analog of xenotime-(Y).

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

The type locality is 100 m southwest of Hollkegel, which is 12 km south-southwest of Murzzuschlag, Fischbacher Alpen, Styria, Austria. Link to MinDat.org Location Data.

Name Origin:

For the mountain Pretul, one of the localities at which the mineral occurs.

Name Pronunciation:

Pretulite + Pronunciation

Synonym:

ICSD 85552

IMA1996-024

PDF 48-477

Pretulite Image

Images:

Pretulite

Comments: SEM-BSE image of a euhedral crystal of pretulite (left), and proposed crystal forms (right).
Location: Apatite-rich oolitic Ordovician ironstone at Saint-Aubin-des-ChÃ¢teaux, Armorican Massif, France. Scale: See Picture.
© Canadian Mineralogist

Pretulite Crystallography

Axial Ratios:

a:c = 1:0.88116

Cell Dimensions:

a = 6.589, c = 5.806, Z = 4; V = 252.07 Den(Calc)= 3.69

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4₁/amd

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

By Intensity(I/I_o): 3.293(1), 1.6927(0.45), 2.4636(0.42),

Forms:

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

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

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

Bernhard F , Walter F , Ettinger K , Taucher J , Mereiter K , American Mineralogist , 83 (1998) p.625-630, Pretulite, ScPO4, a new scandium mineral from the Styrian and Lower Austrian, lazulite occurrences, Austria

View Additional jPOWD Structure files for Pretulite
[1]

Physical Properties of Pretulite

Cleavage:

{100} Perfect

Color:

Pale pink.

Density:

3.71

Diaphaneity:

Transparent

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

5 - Apatite

Luster:

Adamantine

Streak:

white

Optical Properties of Pretulite

Gladstone-Dale:

CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2126,KPDmeas= 0.2115,KC= 0.2195
Ncalc = 1.81

Optical Data:

Uniaxial (+), w=1.709, e=1.86, bire=0.1510.

Calculated Properties of Pretulite

Electron Density:

Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Pretulite =3.69 gm/cc.

Fermion Index:

Fermion Index = 0.0002195344
Boson Index = 0.9997804656

Photoelectric:

PE_Pretulite= 5.60 barns/electron
U=PE_Pretulite x rElectron Density= 20.07 barns/cc.

Radioactivity:

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

Pretulite Classification

Dana Class:

38.04.11.05 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.11)Zenotime Group (Tetragonal: I41/amd)

38.04.11.01 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.02 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.03 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.04 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.05 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.06 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.07 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

38.04.11.08 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Strunz Class:

08.AD.35 08 - PHOSPHATES, ARSENATES, VANADATES

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

08.AD -With only large cations

08.AD.35 Dreyerite BiVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

08.AD.35 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Other Pretulite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p625-630,1998) OPTIC PROP.(Am.Min.,Vol.83,p625-630,1998)

See Also:

Links to other databases for Pretulite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

Search for Pretulite using:

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

Visit our Advertisers for Pretulite :

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

Ask about Pretulite 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 Español

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

Pretulite

ScPO4
Dana No: 38.04.11.05 Strunz No: 08.AD.35
Locality:

Notes: