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⇱ Lotharmeyerite: Mineral information, data and localities.

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Lotharmeyerite

A valid IMA mineral species
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About LotharmeyeriteHide

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Formula:
CaZn2(AsO4)2 · 2H2O
Zn may be replaced by minor Mn3+.
Colour:
Dark red, dark orange-brown, pale pinkish, white
Lustre:
Sub-Vitreous
Hardness:
3
Specific Gravity:
4.23
Crystal System:
Monoclinic
Name:
Named by Pete J. Dunn in 1983 in honor of Julius Lothar Meyer (19 August 1830 Varel, Germany - 11 April 1895, Tübingen, Germany), a chemist who developed early concepts for the periodic table of elements.
Isostructural with:
Chemically very similar to stergiouite (which has more water).
Visually indistinguishable from manganlotharmeyerite. Also very similar to cobaltlotharmeyerite.


Unique IdentifiersHide

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Mindat ID:
2439
Long-form identifier:
mindat:1:1:2439:2

IMA Classification of LotharmeyeriteHide

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Approved
Approval year:
1985

Classification of LotharmeyeriteHide

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8.CG.15

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
Dana 7th ed.:
40.2.11.1
37.1.6.1

37 : ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
1 : Miscellaneous
20.3.18

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
LmyIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of LotharmeyeriteHide

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Sub-Vitreous
Transparency:
Translucent
Colour:
Dark red, dark orange-brown, pale pinkish, white
Streak:
Pale orange to yellow-orange
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {001}
Fracture:
Irregular/Uneven
Density:
4.23(5) g/cm3 (Measured)    4.29(4) g/cm3 (Calculated)

Optical Data of LotharmeyeriteHide

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Type:
Biaxial (+)
RI values:
nα = 1.797 nβ = 1.804 nγ = 1.815
2V:
Measured: 80° , Calculated: 78°
Birefringence:
0.018
Max. Birefringence:
δ = 0.018
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate
Dispersion:
r >> v strong, inclined
Optical Extinction:
Inclined
Pleochroism:
Strong
Comments:
X=Y= yellow-orange
Z= red-brown
Comments:
Also given as "dark red orange to light pink-orange"

Chemistry of LotharmeyeriteHide

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Mindat Formula:
CaZn2(AsO4)2 · 2H2O

Zn may be replaced by minor Mn3+.
Element Weights:
Element% weight
O33.008 %
As30.914 %
Zn26.977 %
Ca8.269 %
H0.832 %

Calculated from ideal end-member formula.
Common Impurities:
Mn

Crystallography of LotharmeyeriteHide

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Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.066(4) Å, b = 6.276(2) Å, c = 7.408(2) Å
β = 116.16°
Ratio:
a:b:c = 1.445 : 1 : 1.18
Unit Cell V:
378.33 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Equant to tapering bladelike crystals to 6mm.
Twinning:
Probable about [h0l]
Comment:
MR (1984) 15:223

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0018604LotharmeyeriteYang Y W, Evans S H, Downs R T, Yang H (2012) Lotharmeyerite, Ca(Zn,Mn)2(AsO4)2(H2O,OH)2 Acta Crystallographica E68 i9-i10👁 Image
2012Mapimi, Durango, Mexico0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
4.94 Å(80)
3.41 Å(90)
3.18 Å(90)
2.91 Å(90)
2.82 Å(80)
2.71 Å(80)
2.56 Å(100)
1.687 Å(80)
Comments:
ICDD 35-620

Geological EnvironmentHide

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Paragenetic Mode(s):
Geological Setting:
Oxidation zone of arsenic containing polymetallic ore deposits.

Type Occurrence of LotharmeyeriteHide

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Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 149482.
Geological Setting of Type Material:
Oxidized zones of arsenic-bearing deposits.
Associated Minerals at Type Locality:

Other Language Names for LotharmeyeriteHide

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Relationship of Lotharmeyerite to other SpeciesHide

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Other Members of Tsumcorite Group:
AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
CobalttsumcoritePbCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
KaliochalciteKCu2(SO4)2[(OH)(H2O)]Mon. 2/m : B2/m
KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
MounanaitePbFe3+2(VO4)2(OH)2Mon. 2/m : B2/m
NatrochalciteNaCu2(SO4)2(OH) · 2H2OMon. 2/m : B2/m
NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
RappolditePbCo2(AsO4)2 · 2H2OTric. 1 : P1
SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1

Common AssociatesHide

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Associations Based on Photo Data:
10 photos of Lotharmeyerite associated with CryptomelaneK(Mn4+7Mn3+)O16
7 photos of Lotharmeyerite associated with 'Manganese-bearing Adamite'(Zn,Mn)2(AsO4)(OH)
3 photos of Lotharmeyerite associated with AdamiteZn2(AsO4)(OH)

Related Minerals - Strunz-mindat GroupingHide

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8.CG.FluckiteCaMn2+(AsO3OH)2 · 2H2OTric. 1 : P1
8.CG.DondoelliteCa2Fe(PO4)2 · 2H2OTric. 1 : P1
8.CG.'Ca-Huréaulite'CaMn5(PO4)4 · 4H2O
8.CG.AlumolukrahniteCa[CuAl](AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
8.CG.05MesseliteCa2Fe2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2OTric. 1 : P1
8.CG.05AnorthoroseliteCa2Co(AsO4)2 · 2H2OTric.
8.CG.05CassidyiteCa2Ni(PO4)2 · 2H2OTric.
8.CG.05FairfielditeCa2Mn2+(PO4)2 · 2H2OTric. 1 : P1
8.CG.05HilliteCa2Zn(PO4)2 · 2H2OTric. 1 : P1
8.CG.05'Unnamed (Fe2+-analogue of Parabrandtite)'Ca2Fe2+(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RoseliteCa2Co(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10BrandtiteCa2Mn2+(AsO4)2 · 2H2OMon. 2/m : P21/b
8.CG.10'Unnamed (Fe2+-analogue of Brandtite)'Ca2Fe2+(AsO4)2 · 2H2O
8.CG.15MawbyitePbFe3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15ThometzekitePbCu2+2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15YancowinnaitePbCuAl(AsO4)2OH · H2O Tric. 1 : P1
8.CG.15SchneebergiteBiCo2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15CabalzariteCaMg2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15NickelschneebergiteBiNi2(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2Mon. 2/m : B2/m
8.CG.15MagnesiofluckiteCaMg(AsO3OH)2(H2O)2Tric. 1 : P1
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15CobalttsumcoritePbCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2Mon. 2/m : B2/m
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15FerrilotharmeyeriteCaZnFe3+(AsO4)2(OH) · H2OMon. 2/m : B2/m
8.CG.15CobaltlotharmeyeriteCaCo2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.15MounanaitePbFe3+2(VO4)2(OH)2Mon. 2/m : B2/m
8.CG.15NickellotharmeyeriteCaNi2(AsO4)2 · 2H2OMon. 2/m : B2/m
8.CG.20LukrahniteCaCuFe3+(AsO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20HelmutwinkleritePbZn2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.20PhosphogartrellitePbCuFe3+(PO4)2(OH,H2O)2Tric. 1 : P1
8.CG.20GartrellitePbCuFe3+(AsO4)2(OH) · H2OTric. 1 : P1
8.CG.20ZincgartrellitePbZn2(AsO4)2(H2O,OH)2Tric. 1 : P1
8.CG.20RappolditePbCo2(AsO4)2 · 2H2OTric. 1 : P1
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0)Tet. 4/m : I41/a
8.CG.25Armellinoite-(Ce)Ca4Ce4+(AsO4)4 · H2OTet. 4/m : I41/a
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2OTric. 1 : P1
8.CG.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.

Fluorescence of LotharmeyeriteHide

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Not fluorescent

Other InformationHide

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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for LotharmeyeriteHide

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mindat.org URL:
https://www.mindat.org/min-2439.html
Please feel free to link to this page.

References for LotharmeyeriteHide

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Reference List:

Localities for LotharmeyeriteHide

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Showing 5 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Chile
  • Atacama
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga mining district
Kampf et al. (2015)
Germany
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
58. +1 other reference
Greece
  • Attica
    • East Attica
      • Lavreotiki
        • Agios Konstantinos (Kamariza)
          • Kamariza Mines (Kamareza Mines)
Kolitsch et al. (2014)
Mexico (TL)
  • Durango
    • Mapimí Municipality
      • Mapimí
Dunn (1983)
Moore (2008)
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