Zirklerite Mineral Data

Zirklerite Mineral Data +

General Zirklerite Information

Chemical Formula:

(Fe++,Mg)9Al4Cl18(OH)12·14(H2O) (?)

Composition:

Molecular Weight = 1,634.03 gm

Magnesium 3.35 % Mg 5.55 % MgO

Aluminum 6.60 % Al 12.48 % Al₂O₃

Iron 23.07 % Fe 29.68 % FeO

Hydrogen 2.47 % H 22.05 % H₂O

Chlorine 39.05 % Cl 39.05 % Cl

- % Cl -8.81 % -O=Cl₂

Oxygen 25.46 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

9(Fe²⁺_0.75)9(Mg_0.25)Al₄Cl₁₈(OH)₁₂·14(H₂O)

Environment:

Marine evaporite deposits. An incompletely characterized species.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

Hope, Hanover, Germany. Link to MinDat.org Location Data.

Name Origin:

Named after Zirkler, director of the Aschersleben potash works, Germany.

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Zirklerite Crystallography

Crystal System:

TrigonalSpace Group: Unk

Physical Properties of Zirklerite

Cleavage:

[1011] Perfect, [1011] Perfect, [1011] Perfect

Color:

White, Light gray.

Density:

2.6

Diaphaniety:

Transparent to translucent

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3.5 - Copper Penny

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Zirklerite

Gladstone-Dale:

CI meas= 0.291 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2065,KC= 0.2911

Optical Data:

Uniaxial (+), w=1.522, e=1.552, bire=0.0300.

Calculated Properties of Zirklerite

Electron Density:

r_electron=2.57 gm/cc
note: r_Zirklerite=2.60 gm/cc.

Fermion Index

Fermion Index = 0.00836
Boson Index = 0.99164

Photoelectric:

PE_Zirklerite= 9.62 barns/electron
U=PE_Zirklerite x r_electron= 24.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zirklerite is Not Radioactive

Zirklerite Classification

Dana Class:

10.6.5.1 (10)Oxyhalides and Hydroxyhalides

(10.6)where Am Bn (O,OH)p Xq

(10.6.5)Dana Group

10.6.5.1 Zirklerite (Fe,Mg)9Al4Cl18(OH)12·14(H2O)(?) Unk Trig

Strunz Class:

III/D.04-10 III - Halogenides

III/D - Oxi-halogenides with Mg - Mn - Cu - Zn - Sn

III/D.04 - Atacamite series and related compounds

III/D.04-05 Zharchikhite AlF(OH)2 P 2₁/a 2/m

III/D.04-10 Zirklerite (Fe,Mg)9Al4Cl18(OH)12·14(H2O)(?) Unk Trig

Other Zirklerite Information

References:

NAME( Dana8) PHYS. PROP.(Ford32) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Zirklerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Zirklerite

(Fe++,Mg)9Al4Cl18(OH)12·14(H2O) (?)
Dana No: 10.6.5.1 Strunz No: III/D.04-10
Locality:

Notes: