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Lotharmeyerite

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Julius Lothar Meyer
Formula:
Ca(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
Colour:
Dark red. dark orange brown
Lustre:
Sub-Vitreous
Hardness:
3
Specific Gravity:
4.23
Crystal System:
Monoclinic
Name:
For German chemist Julius Lothar Meyer (1830-1895) who developed early concepts for the periodic table of elements.
Isostructural with:
Visually indistinguishable from manganlotharmeyerite.


Classification of Lotharmeyerite

Approved
Approval Year:
1985
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

Physical Properties of Lotharmeyerite

Sub-Vitreous
Transparency:
Translucent
Colour:
Dark red. dark orange brown
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 Lotharmeyerite

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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
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"

Chemical Properties of Lotharmeyerite

Formula:
Ca(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
IMA Formula:
CaZn2(AsO4)2 · 2H2O

Crystallography of Lotharmeyerite

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

X-Ray Powder Diffraction

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

Type Occurrence of Lotharmeyerite

Geological Setting of Type Material:
Oxidized zones of arsenic-bearing deposits.
Associated Minerals at Type Locality:

Other Language Names for Lotharmeyerite

Relationship of Lotharmeyerite to other Species

Other Members of this group:
CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
KaliochalciteKCu2(SO4)2[(OH)(H2O)]
KrettnichitePbMn3+2(VO4)2(OH)2
LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2
MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
MounanaitePbFe3+2(VO4)2(OH,F)2
NatrochalciteNaCu2(SO4)2(OH) · 2H2O
Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2(H2O,OH)2
PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
TsumcoritePbZn2(AsO4)2 · 2H2O
YancowinnaitePbCuAl(AsO4)2OH · H2O
ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)

Common Associates

Associated Minerals Based on Photo Data:
Cryptomelane4 photos of Lotharmeyerite associated with Cryptomelane on mindat.org.
Manganoan Adamite3 photos of Lotharmeyerite associated with Manganoan Adamite on mindat.org.
Adamite2 photos of Lotharmeyerite associated with Adamite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2O
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2O
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15MawbyitePb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15MounanaitePbFe3+2(VO4)2(OH,F)2
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePbZn2(AsO4)2 · 2H2O
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15KrettnichitePbMn3+2(VO4)2(OH)2
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)
8.CG.15ManganlotharmeyeriteCaMn3+2(AsO4)2(OH)2
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
8.CG.25Pottsite(Pb3xBi4-2x)(VO4)4·H2O (0.8 < x < 1.0)
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O

Related Minerals - Hey's Chemical Index of Minerals Grouping

20.3.1AdamiteZn2(AsO4)(OH)
20.3.2ParadamiteZn2(AsO4)(OH)
20.3.3KoritnigiteZn(HAsO4) · H2O
20.3.4LegranditeZn2(AsO4)(OH) · H2O
20.3.5WarikahniteZn3(AsO4)2 · 2H2O
20.3.6KöttigiteZn3(AsO4)2 · 8H2O
20.3.7StranskiiteZn2Cu(AsO4)2
20.3.8Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O
20.3.9AustiniteCaZn(AsO4)(OH)
20.3.10ProsperiteCa2Zn4(AsO4)4•H2O ·
20.3.11GaititeCa2Zn(AsO4)2 · 2H2O
20.3.12ZincroseliteCa2Zn(AsO4)2 · 2H2O
20.3.13O'DanieliteNa(Zn,Mg)3H2(AsO4)3
20.3.14JohilleriteNa(Mg,Zn)3Cu(AsO4)3
20.3.15Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8
20.3.16Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
20.3.17Chlorophoenicite(Mn,Mg)3Zn2(AsO4)(OH,O)6
20.3.19Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)
20.3.20OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2O
20.3.21FahleiteCaZn5Fe3+2(AsO4)6 · 14H2O
20.3.22KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2O

Related Minerals - Dana Grouping (8th Ed.)

37.1.6.2FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)

Fluorescence of Lotharmeyerite

Not fluorescent

Other Information

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

References for Lotharmeyerite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1983): 68: 849.
Mineralogical Record (1983) 14:35; (1984): 15: 223-226.
American Mineralogist (1985): 70: 1334.
Brugger, J., Krivovichev, S.V., Kolitsch, U., Meisser, N., Andrut, M., Ansermet, S., Burns, P.C. (2002) Description and crystal structure of manganlotharmeyerite, Ca[Mn 3+, ◻,Mg]2{AsO4,[AsO2(OH)2]}2(OH,H2O)2 from the Starlera Mn deposit,Swiss Alps, and a redefinition of lotharmeyerite. Canadian Mineralogist: 40: 1597-1608.
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.

Internet Links for Lotharmeyerite

mindat.org URL:
https://www.mindat.org/min-2439.html
Please feel free to link to this page.
Specimens:
The following Lotharmeyerite specimens are currently listed for sale on minfind.com.

Localities for Lotharmeyerite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Chile
 
  • Atacama Region
    • Copiapó Province
      • Tierra Amarilla
        • Pampa Larga district
Kampf, A. R., Mills, S. J., Nash, B. P., Dini, M., & Molina Donoso, A. A. (2015). Tapiaite, Ca5Al2 (AsO4) 4 (OH) 4· 12H2O, a new mineral from the Jote mine, Tierra Amarilla, Chile. Mineralogical Magazine, 79(2), 345-354.
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Wolfach
        • Oberwolfach
          • Rankach valley
KOLITSCH, U., GRÖBNER, J. BLASS, G., GRAF, H.-W. & PRING, A. (2005): Neufunde aus der Grube Clara im mittleren Schwarzwald (II): Dreyerit, Gasparit-(Ce), Klinobisvanit, Kobaltkoritnigit, Metatyuyamunit, Roscoelith, Sengierit, Vésigniéit und Wakefieldit. Lapis 30 (9), 35-39; 58.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
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 (in German).
Mexico (TL)
 
  • Durango
    • Mun. de Mapimí
      • Mapimí
Min.Rec.(1983) 14, 35-36
Thomas P. Moore (2008) Lapis, 33, #7-8, 33-40.
Mineral and/or Locality  
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