Lotharmeyerite Mineral Data

Lotharmeyerite Mineral Data +

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General Lotharmeyerite Information

Chemical Formula:

CaZnMn+++(AsO3OH)4(OH)3

Composition:

Molecular Weight = 491.28 gm

Calcium 8.16 % Ca 11.41 % CaO

Manganese 11.18 % Mn 16.07 % Mn₂O₃

Zinc 13.31 % Zn 16.57 % ZnO

Arsenic 30.50 % As 46.78 % As₂O₅

Hydrogen 1.03 % H 9.17 % H₂O

Oxygen 35.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaZnMn³⁺(AsO₃OH)₂(OH)₃

IMA Status:

Approved IMA 1983

Locality:

Ojuela mine, Mapimi, DGO, Mexico. Link to MinDat.org Location Data.

Name Origin:

Named for Julius Lothar Meyer (1830-1895), German chemist who developed concepts for the periodic table.

Lotharmeyerite Image

Images:

Lotharmeyerite

Comments: Brown, prismatic crystals lotharmeyerite on matrix.
Location: Ojuela mine, Mapimi, Durango, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Lotharmeyerite Crystallography

Axial Ratios:

a:b:c =1.4445:1:1.1803

Cell Dimensions:

a = 9.066, b = 6.276, c = 7.408, Z = 2; beta = 116.16° V = 378.33 Den(Calc)= 4.31

Crystal System:

MonoclinicSpace Group: C 2/m,C 2,Cm

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

By Intensity(I/I_o): 2.557(1), 3.175(0.9), 3.414(0.9),

Physical Properties of Lotharmeyerite

Color:

Dark reddish orange, Reddish brown, Red orange.

Density:

4.23

Diaphaniety:

Transparent to Translucent

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

orange

Optical Properties of Lotharmeyerite

Gladstone-Dale:

CI meas= 0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.091 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KPDmeas= 0.1904,KC= 0.2055

Optical Data:

Biaxial (+), a=1.797, b=1.804, g=1.815, bire=0.0180, 2V(Calc)=78, 2V(Meas)=80.

Pleochroism (x):

dark red orange.

Pleochroism (y):

red orange.

Pleochroism (z):

light pink orange.

Calculated Properties of Lotharmeyerite

Electron Density:

r_electron=4.03 gm/cc
note: r_{Lotharmeyerite}=4.23 gm/cc.

Fermion Index

Fermion Index = 0.00574
Boson Index = 0.99426

Photoelectric:

PE_{Lotharmeyerite}= 31.39 barns/electron
U=PE_{Lotharmeyerite} x r_electron= 126.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lotharmeyerite is Not Radioactive

Lotharmeyerite Classification

Dana Class:

37.1.6.1 (37)Anhydrous Acid Phosphates, etc

(37.1)with miscellaneous formulae

(37.1.6)Dana Group

37.1.6.1 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

37.1.6.2 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

37.1.6.3 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

37.1.6.4 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Strunz Class:

VII/C.31-20 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.31 - Mawbyite - Gartrellite series

VII/C.31-02 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-04 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-05 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-06 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

VII/C.31-08 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-10 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-20 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

VII/C.31-30 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-35 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-36 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-40 Thometzekite Pb(Cu,Zn)2(AsO4)2·2(H2O) C 2/m 2/m

VII/C.31-50 Tsumcorite PbZnFe(AsO4)2·(H2O) C 2/m 2/m

VII/C.31-74 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

VII/C.31-78 Lukrahnite! Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2 P1 1

VII/C.31-80 Phosphogartrellite! PbCuFe(PO4)2(OH,H2O)2 P1 1

VII/C.31-90 Gartrellite Pb(Cu,Fe)2(AsO4,SO4)2(CO3,H2O)0.7 P1,P 1 Tri

VII/C.31-92 Zincgartrellite! Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2 P1 1

VII/C.31-98 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2·2(H2O) P1 1

VII/C.31-100 Helmutwinklerite PbZn2(AsO4)2·2(H2O) P1 1

Other Lotharmeyerite Information

References:

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

See Also:

Links to other databases for Lotharmeyerite :
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 -École des Mines de Paris

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Lotharmeyerite

CaZnMn+++(AsO3OH)4(OH)3
Dana No: 37.1.6.1 Strunz No: VII/C.31-20
Locality:

Notes: