Chernykhite Mineral Data

Chernykhite Mineral Data

General Chernykhite Information

Chemical Formula:

(Ba,Na)V+++,Al)2(Si,Al)4O10(OH)2

Composition:

Molecular Weight = 436.38 gm

Barium 8.81 % Ba 9.84 % BaO

Sodium 1.05 % Na 1.42 % Na₂O

Aluminum 14.53 % Al 27.45 % Al₂O₃

Vanadium 16.34 % V 18.89 % V₂O₃ / 6.25 % V₂O₅

Silicon 14.80 % Si 31.67 % SiO₂

Hydrogen 0.46 % H 4.13 % H₂O

Oxygen 44.00 % O

______ ______

100.00 % 99.65 % = TOTAL OXIDE

Empirical Formula:

Ba_0.28Na_0.2V³⁺_1.1Al_0.65V⁵⁺_0.3Si_2.3Al_1.7O₁₀(OH)₂

Environment:

In small veinlets cutting carbonate rocks interbedded with vanadium-rich Lower Paleozoic shales.

IMA Status:

Approved IMA 1972

Locality:

From "northwestern Karatu" [Kara-Tau Mountains], southern Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for V. V. Chernykh, Professor at the Mining Institute, St. Petersburg, Russia.

Chernykhite Image

Images:

Chernykhite

Comments: Dark green flake of chernykhite.
Location: Balasauskandyk, Juzno-Kazahstan, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Chernykhite Crystallography

Axial Ratios:

a:b:c =0.5761:1:2.1806

Cell Dimensions:

a = 5.29, b = 9.182, c = 20.023, Z = 4; beta = 95.68° V = 967.80 Den(Calc)= 2.99

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.33(1), 2.607(0.7), 1.66(0.6),1.996(0.6), 1.53(0.5), 3.01(0.5), 2.887(0.4),

Physical Properties of Chernykhite

Cleavage:

[001] Perfect

Color:

Dark green, Olive green.

Density:

3.14

Diaphaniety:

Transparent to Translucent

Habit:

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

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Chernykhite

Optical Data:

Biaxial (-), a=1.64-1.643, b=1.686-1.691, g=1.702-1.704, bire=0.0610-0.0620, 2V(Calc)=52-58, 2V(Meas)=11-12.

Calculated Properties of Chernykhite

Electron Density:

r_electron=2.89 gm/cc
note: r_Chernykhite=2.99 gm/cc.

Fermion Index

Fermion Index = 0.02323
Boson Index = 0.97677

Photoelectric:

PE_Chernykhite= 40.69 barns/electron
U=PE_Chernykhite x r_electron= 117.57 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Chernykhite is Not Radioactive

Chernykhite Classification

Dana Class:

71.2.2a.3 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.2)with 2:1 Layers

(71.2.2a)Mica Group (Muscovite subgroup)

71.2.2a.1 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

71.2.2a.2 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

71.2.2a.3 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

71.2.2a.4 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

71.2.2a.5 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m

71.2.2a.6 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

71.2.2a.6b Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m

71.2.2a.6c Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

71.2.2a.6d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

71.2.2a.6e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

71.2.2a.7 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

71.2.2a.8 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

71.2.2a.9 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

71.2.2a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m

71.2.2a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

71.2.2a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

Strunz Class:

VIII/H.12-50 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups

VIII/H.12 - Mica group, Lepidolite series

VIII/H.12-10 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m

VIII/H.12-20 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m

VIII/H.12-30 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m

VIII/H.12-35 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m

VIII/H.12-40 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m

VIII/H.12-50 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

VIII/H.12-60 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m

Other Chernykhite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

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Chernykhite

(Ba,Na)V+++,Al)2(Si,Al)4O10(OH)2
Dana No: 71.2.2a.3 Strunz No: VIII/H.12-50
Locality:

Notes: