Wagnerite Mineral Data

Wagnerite Mineral Data +

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General Wagnerite Information

Chemical Formula:

(Mg,Fe++)2(PO4)F

Composition:

Molecular Weight = 162.71 gm

Magnesium 26.89 % Mg 44.59 % MgO

Iron 3.43 % Fe 4.42 % FeO

Phosphorus 19.04 % P 43.62 % P₂O₅

Hydrogen 0.19 % H 1.66 % H₂O

Oxygen 42.28 % O

Fluorine 8.17 % F 8.17 % F

- % F -3.44 % -O=F₂

______ ______

100.00 % 99.02 % = TOTAL OXIDE

Empirical Formula:

Mg_1.8Fe²⁺_0.1(PO₄)F_0.7(OH)_0.3

Environment:

Metamorphic rocks of moderate to high grade. Occurs as the Ma2bc, Ma5bc, Ma7bc and Ma9bc polytypes. See IMA 2003-03-C

IMA Status:

Valid Species (Pre-IMA) 1821

Locality:

Höllengraben, Werfen, Salzburg, Austria. Link to MinDat.org Location Data.

Name Origin:

Named for F. M. von Wagner (1768-1851), mining official in Munich, Germany.

Synonym:

ICSD 26970

Magniotriplite

PDF 42-1330

Wagnerite Image

Images:

Wagnerite

Comments: Crudely formed opaque wagnerite crystal in pegmatite.
Location: Hollengraben, Salzberg, Austria. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wagnerite Crystallography

Axial Ratios:

a:b:c =0.7606:1:0.943

Cell Dimensions:

a = 9.644, b = 12.679, c = 11.957, Z = 16; beta = 108.3° V = 1,388.11 Den(Calc)= 3.11

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.985(1), 3.297(0.65), 3.123(0.63),2.854(0.59), 2.758(0.25), 2.71(0.22), 1.584(0.15),

Forms:

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Forms: [ 1 2 2] [ 0 1 0] [ 0 2 1] [ 1 2 0] [ 1 0 1]

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Crystal Structure:

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Ren L , Grew E S , Xiong M , Ma Z , The Canadian Mineralogist , 41 (2003) p.393-411, Wagnerite-Ma5bc, a new polytype of Mg2(PO4)(F,OH), from granulite-facies, paragneiss, Larsemann Hills, Prydz Bay, East Antartica, Locality: Larsemann Hills, Prydz Bay, East Antartica

Physical Properties of Wagnerite

Cleavage:

[100] Imperfect, [120] Imperfect, [001] Poor

Color:

Greenish, Gray white, Grayish, Yellow, Reddish brown.

Density:

3.07 - 3.14, Average = 3.1

Diaphaniety:

Translucent

Fracture:

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

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

5-5.5 - Apatite-Knife Blade

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Wagnerite

Gladstone-Dale:

CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1874,KPDmeas= 0.1877,KC= 0.1868

Optical Data:

Biaxial (+), a=1.568-1.588, b=1.572-1.589, g=1.582-1.598, bire=0.0100-0.0140, 2V(Calc)=38-66, 2V(Meas)=25-35. Dispersion r < v weak.

Calculated Properties of Wagnerite

Electron Density:

r_electron=3.07 gm/cc
note: r_Wagnerite=3.11 gm/cc.

Fermion Index

Fermion Index = 0.02781
Boson Index = 0.97219

Photoelectric:

PE_Wagnerite= 2.57 barns/electron
U=PE_Wagnerite x r_electron= 7.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Wagnerite is Not Radioactive

Wagnerite Classification

Dana Class:

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

(41.6)where (A)2 (XO4) Zq

(41.6.2)Dana Group

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

Strunz Class:

VII/B.03-10 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.03 - Wagnerite - Sarkinite series

VII/B.03-10 Wagnerite (Mg,Fe)2(PO4)F P 2₁/a 2/m

VII/B.03-20 Magniotriplite? (Mg,Fe,Mn)2(PO4)F P 2₁/a 2/m

VII/B.03-30 Zwieselite (Fe,Mn)2(PO4)F I2/a 2/m

VII/B.03-40 Triplite (Mn,Fe,Mg,Ca)2(PO4)(F,OH) I2/m 2/m

VII/B.03-50 Wolfeite (Fe,Mn)2(PO4)(OH) P 2₁/a 2/m

VII/B.03-60 Triploidite (Mn,Fe)2(PO4)(OH) P 2₁/a 2/m

VII/B.03-65 Stanekite! Fe(Mn,Fe,Mg)(PO4)O P 2₁/a 2/m

VII/B.03-70 Sarkinite Mn2(AsO4)(OH) P 2₁/a 2/m

Other Wagnerite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4, CanMin, v 41, p 392) OPTIC PROP.(AntBidBlaNic4)

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

Wagnerite

(Mg,Fe++)2(PO4)F
Dana No: 41.6.2.1 Strunz No: VII/B.03-10
Locality:

Notes: