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.

Name Pronunciation:

Lotharmeyerite + Pronunciation

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

Diaphaneity:

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
Ncalc = 1.87 - 1.89

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:

Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Lotharmeyerite =4.23 gm/cc.

Fermion Index:

Fermion Index = 0.0057407478
Boson Index = 0.9942592522

Photoelectric:

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

Radioactivity:

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

Lotharmeyerite Classification

Dana Class:

37.01.06.01 (37)Anhydrous Acid Phosphates, etc

(37.01)with miscellaneous formulae

(37.01.06)Lotharmeyerite Series

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

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

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

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

Strunz Class:

08.CG.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CG -With large and medium-sized cations, RO4:H2O = 1:1

08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1

08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Lotharmeyerite

CaZnMn+++(AsO3OH)4(OH)3
Dana No: 37.01.06.01 Strunz No: 08.CG.15
Locality:

Notes: