Cabalzarite Mineral Data

General Cabalzarite Information

Chemical Formula:

Ca(Mg,Al,Fe++)2(AsO4)2(H2O,OH)2

Composition:

Molecular Weight = 413.71 gm

Calcium 9.69 % Ca 13.55 % CaO

Magnesium 4.70 % Mg 7.79 % MgO

Manganese 0.66 % Mn 0.86 % MnO

Aluminum 5.22 % Al 9.86 % Al₂O₃

Iron 4.05 % Fe 5.21 % FeO

Arsenic 36.22 % As 55.56 % As₂O₅

Hydrogen 0.79 % H 7.05 % H₂O

Oxygen 38.67 % O

______ ______

100.00 % 99.88 % = TOTAL OXIDE

Empirical Formula:

CaAl_0.8Mg_0.8Fe²⁺_0.3Mn²⁺_0.05(AsO₄)₂(H₂O)_1.24(OH)_0.76

Environment:

In manganese ore in radiolarites. A member of the tusmcorite group.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

The abandoned manganese mine near Falotta, Graubunden, Switzerland. Link to MinDat.org Location Data.

Name Origin:

For Walter Cabalzar (1919-), an amateur mineralogist of Chur, Switzerland, who contributed to the mineralogy of the Graubunden canton.

Synonym:

ICSD 89713

IMA1997-012

Cabalzarite Image

Images:

Cabalzarite

Comments: Brownish crystals of cabalzarite on matrix.
Location: Falotta, Tinizong (Tinzen), Sursass (Oberhalbstein), Grischun (Grisons; Graubünden), Switzerland. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Cabalzarite Crystallography

Axial Ratios:

a:b:c =1.4528:1:1.1968

Cell Dimensions:

a = 8.925, b = 6.143, c = 7.352, Z = 2; beta = 115.25° V = 364.57 Den(Calc)= 3.77

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): 3.159(1)(112), 2.519(0.81)(221), 2.942(0.67)(201), 4.895(0.59)(110), 2.684(0.55)(311), 3.373(0.54)(202), 4.544(0.35)(111),

Physical Properties of Cabalzarite

Cleavage:

None

Color:

Light brown, Brownish pink, Orange brown.

Density:

3.89

Diaphaneity:

Transparent

Fracture:

Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Cabalzarite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1936,KPDmeas= 0.1877,KC= 0.1899
Ncalc = 1.72 - 1.74

Optical Data:

Biaxial (?), a=1.7, g=1.76, bire=0.0600

Calculated Properties of Cabalzarite

Electron Density:

Bulk Density (Electron Density)=3.73 gm/cc
note: Specific Gravity of Cabalzarite =3.89 gm/cc.

Fermion Index:

Fermion Index = 0.00587603
Boson Index = 0.99412397

Photoelectric:

PE_Cabalzarite= 27.38 barns/electron
U=PE_Cabalzarite x rElectron Density= 102.11 barns/cc.

Radioactivity:

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

Cabalzarite Classification

Dana Class:

40.02.12.01 (40)Hydrated Phosphates, etc

(40.02)where A++ (B++)2 (XO4) � x(H2O)

(40.02.12)Dana Group

40.02.12.01 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)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 Cabalzarite Information

References:

NAME( MinRec v. 32, p 211) PHYS. PROP.(MinRec v. 32, p 211) OPTIC PROP.(MinRec v. 32, p 211)

See Also:

Links to other databases for Cabalzarite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Cabalzarite

Ca(Mg,Al,Fe++)2(AsO4)2(H2O,OH)2
Dana No: 40.02.12.01 Strunz No: 08.CG.15
Locality:

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