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:

Click Here for Larger Wilhelmvierlingite Image

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 - DipyramidalH-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 · 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

Search for Wilhelmvierlingite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Wilhelmvierlingite :

A Bijoux Google Search for Wilhelmvierlingite
Adam's Minerals Google Search for Wilhelmvierlingite
Cape Minerals Google Search for Wilhelmvierlingite
Dakota Matrix Minerals Google Search for Wilhelmvierlingite
Excalibur Mineral Corp. Google Search for Wilhelmvierlingite
Exceptional Minerals Google Search for Wilhelmvierlingite
John Betts Fine Minerals Search for Wilhelmvierlingite
McDougall Minerals Google Search for Wilhelmvierlingite
Mineral News Website Link
Rock and Mineral Shows Google Search for Wilhelmvierlingite
Weinrich Minerals, Inc. Google Search for Wilhelmvierlingite

Ask about Wilhelmvierlingite 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 Wilhelmvierlingite Specimen Label here :

Wilhelmvierlingite

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

Notes: