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 % Fe2 O3
Phosphorus 15.73 % P 36.04 % P2 O5
Hydrogen 1.28 % H 11.44 % H2 O
Oxygen 44.69 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
CaMn2+ Fe3+ (PO4 )2 (OH)•2(H2 O)
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 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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEWilhelmvierlingite = 9.74 barns/electronU=PEWilhelmvierlingite x r Electron 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
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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:
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