Xanthoxenite Mineral Data

General Xanthoxenite Information

Chemical Formula:

Ca4Fe+++2(PO4)4(OH)2•3(H2O)

Composition:

Molecular Weight = 739.95 gm

Calcium 21.67 % Ca 30.31 % CaO

Iron 15.09 % Fe 21.58 % Fe₂O₃

Phosphorus 16.74 % P 38.37 % P₂O₅

Hydrogen 1.09 % H 9.74 % H₂O

Oxygen 45.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₄Fe³⁺₂(PO₄)₄(OH)₂•3(H₂O)

Environment:

An uncommon alteration product of triphylite in complex zoned granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1920

Locality:

Palermo #1 mine, near North Groton, Grafton Co., New Hampshire, USA. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for yellow and supposed chemical resemblance to cacoxenite.

Name Pronunciation:

Xanthoxenite + Pronunciation

Xanthoxenite Image

Images:

Xanthoxenite

Comments: Xanthoxenite crystalline coating.
Location: Palermo Mine, North Groton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Xanthoxenite Crystallography

Axial Ratios:

a:b:c =0.757:1:0.7389

Cell Dimensions:

a = 6.7, b = 8.85, c = 6.54, Z = 1; alpha = 92.1°, beta = 110.2°, gamma = 93.2° V = 363.13 Den(Calc)= 3.38

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.055(1), 3.489(0.9), 6.27(0.8),

Physical Properties of Xanthoxenite

Cleavage:

{???} Perfect

Color:

Brownish yellow, Light yellow.

Density:

2.8 - 2.97, Average = 2.88

Diaphaneity:

Translucent

Hardness:

2.5 - Finger Nail

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Xanthoxenite

Gladstone-Dale:

CI meas= -0.054 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.103 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2107,KPDmeas= 0.2476,KC= 0.235
Ncalc = 1.66 - 1.8

Optical Data:

Biaxial (-), a=1.704, b=1.715, g=1.724, bire=0.0200, 2V(Calc)=82, 2V(Meas)=80-90.

Calculated Properties of Xanthoxenite

Electron Density:

Bulk Density (Electron Density)=2.87 gm/cc
note: Specific Gravity of Xanthoxenite =2.89 gm/cc.

Fermion Index:

Fermion Index = 0.0037121565
Boson Index = 0.9962878435

Photoelectric:

PE_Xanthoxenite= 7.91 barns/electron
U=PE_Xanthoxenite x rElectron Density= 22.70 barns/cc.

Radioactivity:

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

Xanthoxenite Classification

Dana Class:

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

(42.11)where (AB)4 (XO4)3 Zq ï¿½ x(H2O)

(42.11.15)Dana Group

42.11.15.01 Xanthoxenite Ca4Fe2(PO4)4(OH)2•3(H2O) P1 1

Strunz Class:

08.DH.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1

08.DH.40 Xanthoxenite Ca4Fe2(PO4)4(OH)2•3(H2O) P1 1

Other Xanthoxenite Information

References:

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

See Also:

Links to other databases for Xanthoxenite :
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

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

Xanthoxenite

Ca4Fe+++2(PO4)4(OH)2•3(H2O)
Dana No: 42.11.15.01 Strunz No: 08.DH.40
Locality:

Notes:

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