Manganlotharmeyerite Mineral Data

Manganlotharmeyerite Mineral Data

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General Manganlotharmeyerite Information

Chemical Formula:

Ca(Mn+++,Mg,)2(AsO4)2(OH,H2O)2

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

Empirical Formula:

Ca_0.92(Mn³⁺_0.5)2(Mg_0.2)2(As)O₁₀H_4.2

Environment:

In carbonate-hosted manganese ore.

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Starlera Fe-Mn deposit, Val Ferrera, Eastern Alps, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named as the Mn-dominant lotharmeyerite.

Synonym:

IMA2001-026

Manganlotharmeyerite Image

Images:

Manganlotharmeyerite

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

Axial Ratios:

a:b:c =1.4511:1:1.1857

Cell Dimensions:

a = 9.043, b = 6.2314, c = 7.3889, Z = 2; beta = 116.392° V = 372.97 Den(Calc)= 3.69

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Crystal Structure:

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Brugger J , Krivovichev S V , Kolitsch U , Meisser N , Andrut M , Ansermet S , Burns P C , The Canadian Mineralogist , 40 (2002) p.1597-1608, Description and crystal structure of manganlotharmeyerite,

Physical Properties of Manganlotharmeyerite

Cleavage:

[001] Distinct

Color:

Brownish red, Dark reddish orange.

Density:

3.77

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Irregular - Very brittle fracture producing irregular fragments

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

light brown

Optical Properties of Manganlotharmeyerite

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

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

Electron Density:

r_electron=3.60 gm/cc
note: r_{Manganlotharmeyerite}=3.77 gm/cc.

Fermion Index

Fermion Index = 0.00264
Boson Index = 0.99736

Photoelectric:

PE_{Manganlotharmeyerite}= 29.13 barns/electron
U=PE_{Manganlotharmeyerite} x r_electron= 104.84 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganlotharmeyerite is Not Radioactive

Manganlotharmeyerite Classification

Dana Class:

40.2.3.5 (40)Hydrated Phosphates, etc

(40.2)where A++ (B++)2 (XO4) · x(H2O)

(40.2.3)Roselite Subgroup (Monoclinic: P21/c)

40.2.3.1 Roselite Ca2(Co,Mg)(AsO4)2·2(H2O) P 2₁/c 2/m

40.2.3.2 Brandtite Ca2(Mn,Mg)(AsO4)2·2(H2O) P 2₁/c 2/m

40.2.3.3 Zincroselite Ca2Zn(AsO4)2·2(H2O) P 2₁/c 2/m

40.2.3.4 Wendwilsonite Ca2(Mg,Co)(AsO4)2·2(H2O) P 2₁/c 2/m

40.2.3.5 Manganlotharmeyerite ! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Strunz Class:

VII/C.31-30 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.31 - Mawbyite - Gartrellite series

VII/C.31-02 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-04 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-05 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-06 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

VII/C.31-08 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-10 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-20 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

VII/C.31-30 Manganlotharmeyerite Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-35 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-36 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

VII/C.31-40 Thometzekite Pb(Cu,Zn)2(AsO4)2·2(H2O) C 2/m 2/m

VII/C.31-50 Tsumcorite PbZnFe(AsO4)2·(H2O) C 2/m 2/m

VII/C.31-74 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

VII/C.31-78 Lukrahnite! Ca(Cu,Zn)(Fe,Zn)(AsO4)2(OH,H2O)2 P1 1

VII/C.31-80 Phosphogartrellite! PbCuFe(PO4)2(OH,H2O)2 P1 1

VII/C.31-90 Gartrellite Pb(Cu,Fe)2(AsO4,SO4)2(CO3,H2O)0.7 P1,P 1 Tri

VII/C.31-92 Zincgartrellite! Pb(Zn,Fe,Cu)2(AsO4)2(OH,H2O)2 P1 1

VII/C.31-98 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2·2(H2O) P1 1

VII/C.31-100 Helmutwinklerite PbZn2(AsO4)2·2(H2O) P1 1

Other Manganlotharmeyerite Information

References:

NAME( CanMin, v 41, p 818) PHYS. PROP.(CanMin, v 41, p 818) OPTIC PROP.(CanMin, v 41, p 818)

See Also:

Links to other databases for Manganlotharmeyerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Manganlotharmeyerite

Ca(Mn+++,Mg,)2(AsO4)2(OH,H2O)2
Dana No: 40.2.3.5 Strunz No: VII/C.31-30
Locality:

Notes: