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Manganlotharmeyerite Mineral Data

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General Manganlotharmeyerite Information

Help on Chemical  Formula: Chemical Formula: Ca(Mn+++,Mg,)2(AsO4)2(OH,H2O)2
Help on Composition: Composition: Molecular Weight = 414.80 gm
   Calcium     8.70 %  Ca   12.17 % CaO
   Magnesium   2.34 %  Mg    3.89 % MgO
   Manganese  13.24 %  Mn   19.03 % Mn2O3
   Arsenic    36.12 %  As   55.41 % As2O5
   Hydrogen    1.02 %  H     9.12 % H2O
   Oxygen     38.57 %  O
             ______        ______ 
             100.00 %       99.61 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.92(Mn3+0.5)2(Mg0.2)2(As)O10H4.2
Help on Environment: Environment: In carbonate-hosted manganese ore.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Starlera Fe-Mn deposit, Val Ferrera, Eastern Alps, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Mn-dominant lotharmeyerite.
Help on Synonym: Synonym: IMA2001-026

Manganlotharmeyerite Image

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Comments: Scanning electron micrograph of subparallel crystals of manganlotharmeyerite.
Location: Massive braunite ores at the Starlera Mn deposit in the Eastern Alps of Switzerland. Scale: See Picture.
© Canadian Mineralogist

Manganlotharmeyerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4511:1:1.1857
Help on Cell Dimensions: Cell Dimensions: a = 9.043, b = 6.2314, c = 7.3889, Z = 2; beta = 116.392° V = 372.97 Den(Calc)= 3.69
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.555(1)(221,312), 3.182(1)(112), 2.718(0.8)(311),4.93(0.8)(110), 2.134(0.7)(202,221), 2.822(0.7)(021), 2.927(0.7)(201),

Physical Properties of Manganlotharmeyerite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Brownish red, Dark reddish orange.
Help on Density: Density: 3.77
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: light brown

Optical Properties of Manganlotharmeyerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2216,KPDmeas= 0.2169,KC= 0.2114
Ncalc = 1.78 - 1.8
Help on Optical Data: Optical Data: Biaxial (+), a=1.785, b=1.814, g=1.854, bire=0.0690, 2V(Calc)=84, 2V(Meas)=~85. Dispersion r < v weak.

Calculated Properties of Manganlotharmeyerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Manganlotharmeyerite =3.77 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0026478418
Boson Index = 0.9973521582
Help on Photoelectric: Photoelectric: PEManganlotharmeyerite = 29.13 barns/electron
U=PEManganlotharmeyerite x rElectron Density= 104.84 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Manganlotharmeyerite is Not Radioactive

Manganlotharmeyerite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) � x(H2O)
  (40.02.03)Roselite Subgroup (Monoclinic: P21/c) Roselite Ca2(Co,Mg)(AsO4)2•2(H2O) P 21/c 2/m Brandtite Ca2(Mn,Mg)(AsO4)2•2(H2O) P 21/c 2/m Zincroselite Ca2Zn(AsO4)2•2(H2O) P 21/c 2/m Wendwilsonite Ca2(Mg,Co)(AsO4)2•2(H2O) P 21/c 2/m Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m
Help on  Strunz Class: 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 Manganlotharmeyerite Information

Help on References: References: NAME( CanMin, v 41, p 818) PHYS. PROP.(CanMin, v 41, p 818) OPTIC PROP.(CanMin, v 41, p 818)
Help on See Also: See Also: Links to other databases for Manganlotharmeyerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.CG.15





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