Ferrilotharmeyerite Mineral Data

General Ferrilotharmeyerite Information

Chemical Formula:

Ca(Zn,Cu++)(Fe+++,Zn)(AsO4)2(OH,H2O)2

Composition:

Molecular Weight = 490.79 gm

Calcium 7.35 % Ca 10.28 % CaO

Zinc 10.66 % Zn 13.27 % ZnO

Iron 10.24 % Fe 14.64 % Fe₂O₃

Copper 3.88 % Cu 4.37 % Cu₂O

Arsenic 30.53 % As 46.83 % As₂O₅

Hydrogen 0.51 % H 4.59 % H₂O

Lead 4.22 % Pb 4.55 % PbO

Oxygen 32.60 % O

______ ______

100.00 % 98.53 % = TOTAL OXIDE

Empirical Formula:

Ca_0.9Pb_0.1Fe³⁺_0.9Zn_0.8Cu_0.3(AsO₄)₂(OH)_1.5(H₂O)_0.5

Environment:

On museum specimens from a dolostone-hosted hydrothermal polymetallic ore deposit.

IMA Status:

Approved IMA 1992

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

As the ferric iron analog of lotharmeyerite

Synonym:

ICSD 76614

IMA1986-024

PDF 45-1390

Ferrilotharmeyerite Image

Images:

Ferrilotharmeyerite

Comments: Brown crystalline aggregates of ferrilotharmeyerite on quartz.
Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Ferrilotharmeyerite Crystallography

Axial Ratios:

a:b:c =1.4437:1:1.1841

Cell Dimensions:

a = 9.006, b = 6.238, c = 7.387, Z = 2; beta = 115.54° V = 374.45 Den(Calc)= 4.35

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/I_o): 2.938(1), 3.175(1), 3.398(1),

Physical Properties of Ferrilotharmeyerite

Cleavage:

{001} Good

Color:

Brownish yellow, Yellow brown.

Density:

4.25

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Habit:

Tabular - Form dimensions are thin in one direction.

Habit:

Wedge shaped - Crystals shaped like a wedge.

Hardness:

3 - Calcite

Luster:

Adamantine - Greasy

Streak:

light yellow

Optical Properties of Ferrilotharmeyerite

Gladstone-Dale:

CI meas= -0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1943,KPDmeas= 0.1988,KC= 0.1964
Ncalc = 1.83 - 1.85

Optical Data:

Biaxial (+), a=1.83, b=1.835, g=1.87, bire=0.0400, 2V(Calc)=44, 2V(Meas)=40. Dispersion r > v distinct.

Pleochroism (x):

olive green or orange.

Pleochroism (y):

pale green or yellow.

Pleochroism (z):

colorless or colorless.

Calculated Properties of Ferrilotharmeyerite

Electron Density:

Bulk Density (Electron Density)=4.09 gm/cc
note: Specific Gravity of Ferrilotharmeyerite =4.35 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Ferrilotharmeyerite}= 101.22 barns/electron
U=PE_{Ferrilotharmeyerite} x rElectron Density= 414.12 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrilotharmeyerite is Not Radioactive

Ferrilotharmeyerite Classification

Dana Class:

37.01.06.02 (37)Anhydrous Acid Phosphates, etc

(37.01)with miscellaneous formulae

(37.01.06)Lotharmeyerite Series

37.01.06.01 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

37.01.06.02 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

37.01.06.03 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

37.01.06.04 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

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 Ferrilotharmeyerite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(AntBidBlaNic4)

See Also:

Links to other databases for Ferrilotharmeyerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Ferrilotharmeyerite

Ca(Zn,Cu++)(Fe+++,Zn)(AsO4)2(OH,H2O)2
Dana No: 37.01.06.02 Strunz No: 08.CG.15
Locality:

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