Inesite Mineral Data

Inesite Mineral Data +

General Inesite Information

Chemical Formula:

Ca2Mn7Si10O28(OH)2·5(H2O)

Composition:

Molecular Weight = 1,317.65 gm

Calcium 6.08 % Ca 8.51 % CaO

Manganese 29.19 % Mn 37.69 % MnO

Silicon 21.31 % Si 45.60 % SiO₂

Hydrogen 0.92 % H 8.20 % H₂O

Oxygen 42.50 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mn²⁺₇Si₁₀O₂₈(OH)₂·5(H₂O)

Environment:

Hydrothermally altered Mn-bearing rocks.

IMA Status:

Valid Species (Pre-IMA) 1887

Locality:

Banska Stiavnica, Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

From the Greek ines - "flesh fibers."

Synonym:

Agnolite

ICSD 100627

PDF 33-293

Inesite Image

Images:

Inesite

Comments: Bladed crystals of orangish pink Inesite.
Location: N'Chwaning Mine, Kalahari, South Africa. Scale: 14 x 7.5 cm.
© John Veevaert

Images:

Inesite Ruizite

Comments: 1- 3 mm crystal spray of red orange ruizite in an exposed vug in pink inesite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 1 cm.
© John Veevaert

Images:

Inesite Hubeite

Comments: Brown hubeite aggregates accompanied by prismatic pinkish inesite crystals.
Location: Fengjiashan Mine, Daye, Hubei China. Scale: 5.3 x 3.7 x 1.1 cm.
© Fabre Minerals

Images:

Inesite Hubeite

Comments: Translucent, deep root beer brown, platy hueite crystals in fan-like groups to 1mm with delicate pink laths of inesite.
Location: Fengjiashan Mine, Daye Co., Huangshi Prefecture, Hubei Province, China. Scale: Picture Size 5 mm.
© Tom Loomis / Dakota Matrix

Inesite Crystallography

Axial Ratios:

a:b:c =0.9612:1:1.295

Cell Dimensions:

a = 8.889, b = 9.247, c = 11.975, Z = 1; alpha = 88.15°, beta = 132.07°, gamma = 96.64° V = 725.40 Den(Calc)= 3.02

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 9.16(1), 2.84(0.8), 2.92(0.8),

Physical Properties of Inesite

Cleavage:

[010] Perfect, [100] Good

Color:

Brown, Brown, Pink, Orange.

Density:

3.029 - 3.1, Average = 3.06

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

6 - Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Inesite

Gladstone-Dale:

CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2085,KPDmeas= 0.2055,KC= 0.2149

Optical Data:

Biaxial (-), a=1.609, b=1.636, g=1.644, bire=0.0350, 2V(Calc)=56, 2V(Meas)=60.

Calculated Properties of Inesite

Electron Density:

r_electron=2.97 gm/cc
note: r_Inesite=3.02 gm/cc.

Fermion Index

Fermion Index = 0.01024
Boson Index = 0.98976

Photoelectric:

PE_Inesite= 8.95 barns/electron
U=PE_Inesite x r_electron= 26.55 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Inesite is Not Radioactive

Inesite Classification

Dana Class:

66.3.3.1 (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.3)with chains P>2

(66.3.3)P=5

66.3.3.1 Inesite Ca2Mn7Si10O28(OH)2·5(H2O) P1 1

Strunz Class:

VIII/F.27-90 VIII - Silicates

VIII/F - Inosilicates (chain and band) Five chains [Si5O15]10-

VIII/F.27 - Rhodonite - Inesite series

VIII/F.27-10 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

VIII/F.27-20 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

VIII/F.27-30 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

VIII/F.27-35 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

VIII/F.27-40 Santaclaraite CaMn4Si5O14(OH)2·(H2O) P1 1

VIII/F.27-50 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

VIII/F.27-60 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

VIII/F.27-70 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

VIII/F.27-80 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

VIII/F.27-90 Inesite Ca2Mn7Si10O28(OH)2·5(H2O) P1 1

Other Inesite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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Inesite

Ca2Mn7Si10O28(OH)2·5(H2O)
Dana No: 66.3.3.1 Strunz No: VIII/F.27-90
Locality:

Notes: