Drugmanite Mineral Data

Drugmanite Mineral Data +

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General Drugmanite Information

Chemical Formula:

Pb2(Fe+++,Al)H(PO4)2(OH)2

Composition:

Molecular Weight = 688.00 gm

Aluminum 0.98 % Al 1.85 % Al₂O₃

Iron 6.09 % Fe 8.70 % Fe₂O₃

Phosphorus 9.00 % P 20.63 % P₂O₅

Hydrogen 0.44 % H 3.93 % H₂O

Lead 60.23 % Pb 64.88 % PbO

Oxygen 23.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₂Fe³⁺_0.75Al_0.25H(PO₄)₂(OH)₂

IMA Status:

Approved IMA 1979

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 202794

PDF 33-732

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Drugmanite Crystallography

Axial Ratios:

a:b:c =1.3916:1:0.5822

Cell Dimensions:

a = 11.1, b = 7.976, c = 4.644, Z = 2; beta = 90.6° V = 411.13 Den(Calc)= 5.56

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): 3.752(1), 4.63(0.9), 3.35(0.8),

Crystal Structure:

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King G S D , Sengier-Roberts L , Bulletin de Mineralogie , 111 (1988) p.431-437, Drugmanite, Pb2(Fe0.78Al0.22)H(PO4)2(OH)2:, Its crystal structure and place in the datolite group, Locality: Richelle, Belgium, Note: anisoU s taken from ICSD

Physical Properties of Drugmanite

Color:

Colorless, Light yellow.

Density:

5.55

Diaphaniety:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Drugmanite

Gladstone-Dale:

CI meas= 0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1565,KPDmeas= 0.1568,KC= 0.1687

Optical Data:

Biaxial (?), b=1.87, 2V(Meas)=33.

Calculated Properties of Drugmanite

Electron Density:

r_electron=4.84 gm/cc
note: r_Drugmanite=5.55 gm/cc.

Fermion Index

Fermion Index = 0.13451
Boson Index = 0.86549

Photoelectric:

PE_Drugmanite=1,063.69 barns/electron
U=PE_Drugmanite x r_electron=5,144.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Drugmanite is Not Radioactive

Drugmanite Classification

Dana Class:

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

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.11)Dana Group

41.10.11.1 Drugmanite Pb2(Fe,Al)H(PO4)2(OH)2 P 2₁/a 2/m

Strunz Class:

VII/B.29-70 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.29 - Bjarebyite group

VII/B.29-10 Penikisite BaMg2Al2(PO4)3(OH)3 P1 1

VII/B.29-20 Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-30 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-35 Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-40 Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 2₁/m 2/m

VII/B.29-50 Jagowerite BaAl2(PO4)2(OH)2 P1 1

VII/B.29-60 Vesignieite Cu3Ba(VO4)2(OH)2 C 2/m 2/m

VII/B.29-70 Drugmanite Pb2(Fe,Al)H(PO4)2(OH)2 P 2₁/a 2/m

VII/B.29-80 Mounanaite PbFe2(VO4)2(OH)2 P1 1

Other Drugmanite Information

References:

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

See Also:

Links to other databases for Drugmanite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Drugmanite

Pb2(Fe+++,Al)H(PO4)2(OH)2
Dana No: 41.10.11.1 Strunz No: VII/B.29-70
Locality:

Notes: