Kinichilite Mineral Data

Kinichilite Mineral Data +

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General Kinichilite Information

Chemical Formula:

Mg0.5[Mn++Fe+++(TeO3)3]·4.5(H2O)

Composition:

Molecular Weight = 730.80 gm

Magnesium 1.66 % Mg 2.76 % MgO

Manganese 7.52 % Mn 9.71 % MnO

Iron 7.64 % Fe 10.93 % Fe₂O₃

Tellurium 52.38 % Te 65.52 % TeO₂

Hydrogen 1.24 % H 11.09 % H₂O

Oxygen 29.56 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg_0.5Mn²⁺Fe³⁺(TeO₃)₃·4.5(H₂O)

Environment:

Mn-dominant analog of zemannite and keystoneite. With other Te oxy-salts.

IMA Status:

Approved IMA 1981

Locality:

Kawazu mine, Shimada, Izu Peninsula, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Kin-Ichi Sakurai (1912-1993), Japanese amateur mineralogist and collector, coauthor of "Minerals of Japan" 1938.

Synonym:

ICSD 79850

PDF 33-609

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Kinichilite Crystallography

Axial Ratios:

a:c = 1:0.81378

Cell Dimensions:

a = 9.419, c = 7.665, Z = 2; V = 588.91 Den(Calc)= 4.12

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 4.079(1), 8.15(0.9), 2.79(0.85),

Crystal Structure:

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Miletich F , European Journal of Mineralogy , 7 (1995) p.509-523, Crystal chemistry of the microporous tellurite minerals

Physical Properties of Kinichilite

Cleavage:

None

Color:

Dark brown.

Density:

3.96

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Hardness:

2 - Gypsum

Luster:

Subadamantine

Streak:

brown

Optical Properties of Kinichilite

Dichroism (e):

light brown.

Dichroism (w):

yellowish brown.

Gladstone-Dale:

CI meas= 0.116 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.15 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1942,KPDmeas= 0.202,KC= 0.2285

Optical Data:

Uniaxial (+), w=1.8, e=1.8, bire=0.0000.

Calculated Properties of Kinichilite

Electron Density:

r_electron=3.58 gm/cc
note: r_Kinichilite=3.96 gm/cc.

Fermion Index

Fermion Index = 0.04527
Boson Index = 0.95473

Photoelectric:

PE_Kinichilite= 182.56 barns/electron
U=PE_Kinichilite x r_electron= 652.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kinichilite is Not Radioactive

Kinichilite Classification

Dana Class:

34.3.2.2 (34)Selenites - Tellurites - Sulfites

(34.3)Dana Type

(34.3.2)Dana Group

34.3.2.1 Zemannite Mg0.5[ZnFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

34.3.2.2 Kinichilite Mg0.5[MnFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

34.3.2.3 Keystoneite Mg0.5[NiFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

Strunz Class:

IV/K.10-20 IV - Oxides

IV/K - Sulfides, selenides, tellurides with [XO3]2- groups and related structures

IV/K.10 - Keystoneite - Francisite series

IV/K.10-10 Keystoneite Mg0.5[NiFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

IV/K.10-20 Kinichilite Mg0.5[MnFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

IV/K.10-30 Zemannite Mg0.5[ZnFe(TeO3)3]·4.5(H2O) P 6₃/m 6/m

IV/K.10-40 Quetzalcoatlite Zn8Cu4(TeO3)3(OH)18 C6322 6 2 2

IV/K.10-50 Francisite Cu3Bi(SeO3)2O2Cl Pmmn 2/m 2/m 2/m

Other Kinichilite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Kinichilite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

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Kinichilite

Mg0.5[Mn++Fe+++(TeO3)3]·4.5(H2O)
Dana No: 34.3.2.2 Strunz No: IV/K.10-20
Locality:

Notes: