Hydroxylwagnerite Mineral Data

General Hydroxylwagnerite Information

Chemical Formula:

Mg2(PO4)(OH)

Composition:

Molecular Weight = 160.59 gm

Magnesium 30.27 % Mg 50.20 % MgO

Phosphorus 19.29 % P 44.20 % P₂O₅

Hydrogen 0.63 % H 5.61 % H₂O

Oxygen 49.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂(PO₄)(OH)

Environment:

Triplite-triploidite group.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Dora-Maira massif, Vallone di Gilba, Val Varaita, Piemonte, Italy Link to MinDat.org Location Data.

Name Origin:

Named as the OH analog of wagnerite.

Name Pronunciation:

Hydroxylwagnerite + Pronunciation

Synonym:

ICSD 40829

IMA2004-009

PDF 47-957

Hydroxylwagnerite Image

Images:

Hydroxylwagnerite

Comments: Small cavity in white quartzite with several tan-colored hydroxylwagnerite crystals with red arrow pointing to the cavity.
Location: Dora Maira Massif, Val Varaita, Piedmont, Italy. Scale: Picture size 3 mm.
© John Betts - Fine Minerals

Hydroxylwagnerite Crystallography

Axial Ratios:

a:b:c =0.7509:1:0.9385

Cell Dimensions:

a = 9.656, b = 12.859, c = 12.069, Z = 16; beta = 108.49° V = 1,421.21 Den(Calc)= 3.00

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 2.984(1), 2.851(0.8), 3.117(0.66),3.292(0.5), 2.752(0.28), 2.71(0.19), 2.484(0.14),

Physical Properties of Hydroxylwagnerite

Color:

Tan.

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hydroxylwagnerite

Optical Data:

NCalc= 1.6 - from Gladstone-Dale relationship (KC = 0.2003) where Ncalc=Dcalc*KC+1

Calculated Properties of Hydroxylwagnerite

Electron Density:

Bulk Density (Electron Density)=2.99 gm/cc
note: Specific Gravity of Hydroxylwagnerite =3.00 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Hydroxylwagnerite}= 1.60 barns/electron
U=PE_{Hydroxylwagnerite} x rElectron Density= 4.79 barns/cc.

Radioactivity:

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

Hydroxylwagnerite Classification

Dana Class:

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

(41.06)where (A)2 (XO4) Zq

(41.06.02)Wagnerite Group

41.06.02.01 Wagnerite (Mg,Fe)2(PO4)F P 2₁/a 2/m

41.06.02.02 Hydroxylwagnerite! Mg2(PO4)(OH) P 2₁/c 2/m

Strunz Class:

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

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

08.BB -With only medium-sized cations, (OH, etc.):RO4 ï¿½ 1:1

08.BB.10 Magniotriplite? (Mg,Fe,Mn)2(PO4)F P 2₁/a 2/m

08.BB.10 Hydroxylwagnerite! Mg2(PO4)(OH) P 2₁/c 2/m

08.BB.10 Triplite (Mn,Fe,Mg,Ca)2(PO4)(F,OH) I2/m 2/m

08.BB.10 Zwieselite (Fe,Mn)2(PO4)F I2/a 2/m

Other Hydroxylwagnerite Information

References:

PHYS. PROP.(Zeitschrift fUr Kristallographie 177, 15-26)

See Also:

Links to other databases for Hydroxylwagnerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Hydroxylwagnerite

Mg2(PO4)(OH)
Dana No: 41.06.02.02 Strunz No: 08.BB.10
Locality:

Notes:

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