Wilhelmvierlingite Mineral Data

General Wilhelmvierlingite Information

Chemical Formula:

CaMn++Fe+++(PO4)2(OH)•2(H2O)

Composition:

Molecular Weight = 393.84 gm

Calcium 10.18 % Ca 14.24 % CaO

Manganese 13.95 % Mn 18.01 % MnO

Iron 14.18 % Fe 20.27 % Fe₂O₃

Phosphorus 15.73 % P 36.04 % P₂O₅

Hydrogen 1.28 % H 11.44 % H₂O

Oxygen 44.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaMn²⁺Fe³⁺(PO₄)₂(OH)•2(H₂O)

Environment:

Found with secondary phosphates in a pegmatite.

IMA Status:

Approved IMA 1983

Locality:

Hagendorf pegmatite, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for William Vierling (1901-1995), Weiden, Bavaria, Germany.

Name Pronunciation:

Wilhelmvierlingite + Pronunciation

Wilhelmvierlingite Image

Images:

Wilhelmvierlingite Rockbridgeite

Comments: Yellow brown crystals wilhelmvierlingite with black rockbridgeite.
Location: Hagendorf South Pegmatite (Cornelia Mine; Hagendorf South Open Cut), Waidhaus, VohenstrauÃŸ, Oberpfalz, Bavaria, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Wilhelmvierlingite Crystallography

Axial Ratios:

a:b:c =0.8:1:0.3951

Cell Dimensions:

a = 14.8, b = 18.5, c = 7.31, Z = 8; V = 2,001.48 Den(Calc)= 2.61

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca

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

By Intensity(I/I_o): 2.86(1), 9.34(0.7), 5(0.6),

Physical Properties of Wilhelmvierlingite

Cleavage:

{010} Perfect

Color:

Brownish yellow, Yellow.

Density:

2.58

Diaphaneity:

Transparent to Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

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

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Wilhelmvierlingite

Gladstone-Dale:

CI meas= -0.1 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2545,KPDmeas= 0.2575,KC= 0.2341
Ncalc = 1.6 - 1.61

Optical Data:

Biaxial (-), a=1.637, b=1.664, g=1.692, bire=0.0550

Pleochroism (x):

light yellow.

Pleochroism (y):

light yellow.

Pleochroism (z):

dark yellow.

Calculated Properties of Wilhelmvierlingite

Electron Density:

Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Wilhelmvierlingite =2.61 gm/cc.

Fermion Index:

Fermion Index = 0.0033599486
Boson Index = 0.9966400514

Photoelectric:

PE_{Wilhelmvierlingite}= 9.74 barns/electron
U=PE_{Wilhelmvierlingite} x rElectron Density= 25.05 barns/cc.

Radioactivity:

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

Wilhelmvierlingite Classification

Dana Class:

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

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

(42.11.01)Overite Group

42.11.01.01 Overite CaMgAl(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m

42.11.01.02 Segelerite CaMgFe(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m

42.11.01.03 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

42.11.01.04 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

42.11.01.05 Wilhelmvierlingite CaMnFe(PO4)2(OH)•2(H2O) P bca 2/m 2/m 2/m

42.11.01.06 Kaluginite* (Mn,Ca)MgFe(PO4)2(OH)•4(H2O) C cca 2/m 2/m 2/m

42.11.01.07 Juonniite! CaMgSc(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

Strunz Class:

08.DH.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

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

08.DH.20 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

08.DH.20 Juonniite! CaMgSc(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m

08.DH.20 Overite CaMgAl(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m

08.DH.20 Segelerite CaMgFe(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m

08.DH.20 Wilhelmvierlingite CaMnFe(PO4)2(OH)•2(H2O) P bca 2/m 2/m 2/m

Other Wilhelmvierlingite Information

References:

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

See Also:

Links to other databases for Wilhelmvierlingite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Wilhelmvierlingite

CaMn++Fe+++(PO4)2(OH)•2(H2O)
Dana No: 42.11.01.05 Strunz No: 08.DH.20
Locality:

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