Lotharmeyerite (original) (raw)

A valid IMA mineral species

About LotharmeyeriteHide

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Formula:

CaZn2(AsO4)2 · 2H2O

Zn may be replaced by minor Mn3+.

Colour:

Dark red, dark orange-brown

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.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:2439:2

2f437ce5-ab99-47d3-8775-bd9da955dab1

IMA Classification of LotharmeyeriteHide

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Type description reference:

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

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.

Physical Properties of LotharmeyeriteHide

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Colour:

Dark red, dark orange-brown

Streak:

Pale orange to yellow-orange

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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RI values:

_n_α = 1.797 _n_β = 1.804 _n_γ = 1.815

2V:

Measured: 80° , Calculated: 78°

δ = 0.018

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

r >> v strong, inclined

Optical Extinction:

Inclined

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+.

Crystallography of LotharmeyeriteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

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)

Morphology:

Equant to tapering bladelike crystals to 6mm.

Twinning:

Probable about [h0l]

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0018604	Lotharmeyerite	Yang 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		2012	Mapimi, Durango, Mexico	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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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:

Reference:

Dunn, P.J. (1983) Lotharmeyerite, a new mineral from Mapimi, Durango, Mexico. The Mineralogical Record: 14: 35-36.

Other Language Names for LotharmeyeriteHide

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Relationship of Lotharmeyerite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of LotharmeyeriteHide

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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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References for LotharmeyeriteHide

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Reference List:

Dunn, Pete J., Ferraiolo, James A., Fleischer, Michael, Gobel, Volker, Grice, Joel D., Langley, Richard H., Shigley, James E., Vanko, David A., Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (11-12) 1329-1335

Brugger, J., Krivovichev, S. V., Kolitsch, U., Meisser, N., Andrut, M., Ansermet, S., Burns, P. C. (2002) Description and crystal structure of manganlotharmeyerite, Ca[Mn3+,◻,Mg]2{AsO4,[AsO2(OH)2]}2(OH,H2O)2 from the Starlera Mn deposit, Swiss Alps, and a redefinition of lotharmeyerite. The Canadian Mineralogist, 40 (6) 1597-1608 doi:10.2113/gscanmin.40.6.1597

Yang, Yongbo W., Evans, Stanley H., Downs, Robert T., Yang, Hexiong (2012) Lotharmeyerite, Ca(Zn,Mn)2(AsO4)2(H2O,OH)2. Acta Crystallographica Section E Structure Reports Online, 68 (1) 9-10 doi:10.1107/s1600536811054286

Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G., Gröbner, J. (2014) Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I) Mineralien Welt, 25 (1) 60-75

Localities for LotharmeyeriteHide

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

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - 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.