Wardite Mineral Data

General Wardite Information

Chemical Formula:

NaAl3(PO4)2(OH)4•2(H2O)

Composition:

Molecular Weight = 397.94 gm

Sodium 5.78 % Na 7.79 % Na₂O

Aluminum 20.34 % Al 38.43 % Al₂O₃

Phosphorus 15.57 % P 35.67 % P₂O₅

Hydrogen 2.03 % H 18.11 % H₂O

Oxygen 56.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl₃(PO₄)₂(OH)₄•2(H₂O)

Environment:

Alteration product of amblygonite in pegmatites and phosphate deposits.

IMA Status:

Valid Species (Pre-IMA) 1896

Locality:

Clay Canyon, Fairfield, Utah County, Utah, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Henry Augustus Ward (1834-1906), mineral dealer and collector, Rochester, New York, USA.

Name Pronunciation:

Wardite

Synonym:

ICSD 6300

PDF 33-1202

Wardite Image

Images:

Wardite Gordonite

Comments: Prismatic gordonite crystals on massive wardite.
Location: Clay Canyon, Fairfield, Utah County, Utah, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Wardite

Comments: Cream-colored, blocky wardite crystals. The largest wardite crystal is 0.5 cm across.
Location: Taquaral, Minas Gerais, Brazil. Scale: Picture size 1.5 cm.
© John Veevaert

Images:

Wardite Crandallite

Comments: Sliced and polished slab of yellow to white mixture of wardite and crandallite.
Location: Clay Canyon, Fairfield, Utah Co., Utah, USA. Scale: 11x6x.6 cm.
© John Betts - Fine Minerals

Wardite Crystallography

Axial Ratios:

a:c = 1:2.70049

Cell Dimensions:

a = 7.0587, c = 19.062, Z = 4; V = 949.77 Den(Calc)= 2.78

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2

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

By Intensity(I/I_o): 4.725(1), 2.999(0.75), 3.086(0.75),

Crystal Structure:

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Fanfani L , Nunzi A , Zanazzi P F , Mineralogical Magazine , 37 (1970) p.598-605, The crystal structure of wardite, Locality: Fairfield, Utah, USA

Physical Properties of Wardite

Cleavage:

{001} Perfect

Color:

Blue green, Colorless, White, Light green.

Density:

2.81 - 2.87, Average = 2.84

Diaphaneity:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

5 - Apatite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Wardite

Gladstone-Dale:

CI meas= 0.048 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2152,KPDmeas= 0.2107,KC= 0.2212
Ncalc = 1.61 - 1.63

Optical Data:

Uniaxial (+), w=1.59-1.597, e=1.599-1.607, bire=0.0090-0.0100.

Calculated Properties of Wardite

Electron Density:

Bulk Density (Electron Density)=2.79 gm/cc
note: Specific Gravity of Wardite =2.78 gm/cc.

Fermion Index:

Fermion Index = 0.0002732229
Boson Index = 0.9997267771

Photoelectric:

PE_Wardite= 1.47 barns/electron
U=PE_Wardite x rElectron Density= 4.10 barns/cc.

Radioactivity:

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

Wardite Classification

Dana Class:

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

(42.07)where (AB)5 (XO4)3 Zq · x(H2O)

(42.07.08)Cyrilovite Group

42.07.08.01 Cyrilovite NaFe3(PO4)2(OH)4•2(H2O) P 4₁2₁21,P 4₃2₁21 4 2 2

42.07.08.02 Wardite NaAl3(PO4)2(OH)4•2(H2O) P 4₁2₁2 4 2 2

Strunz Class:

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

08.D - Phosphates, etc

08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1

08.DL.10 Cyrilovite NaFe3(PO4)2(OH)4•2(H2O) P 4₁2₁21,P 4₃2₁21 4 2 2

08.DL.10 Millisite (Na,K)CaAl6(PO4)4(OH)9•3(H2O) P 4₁2₁2,P 4₃2₁2 4 2 2

08.DL.10 Wardite NaAl3(PO4)2(OH)4•2(H2O) P 4₁2₁2 4 2 2

Other Wardite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990, Dana8)

See Also:

Links to other databases for Wardite :
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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Ask about Wardite 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 Wardite Specimen Label here :

Wardite

NaAl3(PO4)2(OH)4•2(H2O)
Dana No: 42.07.08.02 Strunz No: 08.DL.10
Locality:

Notes: