Shuiskite Mineral Data

General Shuiskite Information

Chemical Formula:

Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O)

Composition:

Molecular Weight = 506.85 gm

Calcium 15.81 % Ca 22.13 % CaO

Magnesium 2.88 % Mg 4.77 % MgO

Aluminum 6.92 % Al 13.08 % Al₂O₃

Chromium 13.34 % Cr 17.44 % CrO

Iron 1.10 % Fe 1.42 % FeO

Silicon 14.96 % Si 32.01 % SiO₂

Hydrogen 0.80 % H 7.11 % H₂O

Oxygen 44.19 % O

______ ______

100.00 % 97.95 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mg_0.6Al_0.3Fe²⁺_0.1Cr_1.3Al_0.7Si_2.7Al_0.3O₁₁(OH)₂ï¿½(H₂O)

Environment:

On the walls of fractures in chromitite.

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

From the Sarany deposit, Bisersk, in the Gorozavod district, Northern Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for V. P. Shuisk, petrologist of the Ural Scientific Center, Yekaterinburg (Sverdlovsk), Russia.

Name Pronunciation:

Shuiskite + Pronunciation

Shuiskite Image

Images:

Shuiskite

Comments: Acicular shuiskite microcrystal sprays with epidote and prehnite.
Location: Quincy Mine, Hancock, Houghton County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Shuiskite Crystallography

Axial Ratios:

a:b:c =1.5226:1:3.3219

Cell Dimensions:

a = 8.897, b = 5.843, c = 19.41, Z = 4; beta = 98° V = 999.21 Den(Calc)= 3.37

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/m

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

By Intensity(I/I_o): 1.487(1), 1.593(1), 2.9(0.9),

Physical Properties of Shuiskite

Cleavage:

{001} Perfect

Color:

Dark brown.

Density:

3.24

Diaphaneity:

Semitransparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

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

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

light greenish brown

Optical Properties of Shuiskite

Gladstone-Dale:

CI meas= -0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.06 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2243,KPDmeas= 0.2333,KC= 0.2117
Ncalc = 1.69 - 1.71

Optical Data:

Biaxial (-), a=1.725-1.733, b=1.762-1.772, g=1.769-1.775, bire=0.0420-0.0440, 2V(Calc)=30-46, 2V(Meas)=40-50.

Pleochroism (x):

blue violet.

Pleochroism (y):

yellowish green.

Pleochroism (z):

dark violet.

Calculated Properties of Shuiskite

Electron Density:

Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Shuiskite =3.37 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Shuiskite= 6.05 barns/electron
U=PE_Shuiskite x rElectron Density= 20.25 barns/cc.

Radioactivity:

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

Shuiskite Classification

Dana Class:

58.02.02.09 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups

(58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)

(58.02.02)Pumpellyite group

58.02.02.01 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m

58.02.02.02 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m

58.02.02.03 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono

58.02.02.04 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m

58.02.02.05 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

58.02.02.06 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m

58.02.02.07 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

58.02.02.08 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m

58.02.02.09 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

58.02.02.10 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 2/m

58.02.02.11 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m

Strunz Class:

09.BG.20 09 - SILICATES (Germanates)

09.B - Sorosilicates

09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;

09.BG.20 Julgoldite-(Fe++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(OH)2•(H2O) C 2/m 2/m

09.BG.20 Julgoldite-(Fe+++) Ca2Fe(Fe,Al)2(SiO4)(Si2O7)(O,OH)2•(H2O) A2/m 2/m

09.BG.20 Pumpellyite-(Fe++) Ca2Fe(Al,Fe)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

09.BG.20 Okhotskite-(Mg)* Ca3(Mg,Mn)(Mn,Al,Fe)(SiO4)(Si2O7)(OH)2•(H2O) Mono

09.BG.20 Okhotskite-(Mn++) Ca2(Mn,Mg)(Mn,Al,Fe)Si3O10(OH)4 A2/m 2/m

09.BG.20 Pumpellyite-(Fe+++) Ca2FeAl2(SiO4)(Si2O7)(OH,O)2•(H2O) A2/m 2/m

09.BG.20 Pumpellyite-(Mg) Ca2MgAl2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

09.BG.20 Pumpellyite-(Mn++) Ca2(Mn,Mg)(Al,Mn,Fe)2(SiO4)(Si2O7(OH)2•(H2O) A2/m 2/m

09.BG.20 Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O) A2/m 2/m

09.BG.20 Pumpellyite-(Al)! Ca2(Al,Fe,Mg)Al2(SiO4)(Si2O7)(OH,O)2•H2O A2/m 2/m

09.BG.20 Poppiite! Ca2(V,Fe,Mg)(V,Al)2(Si,Al)3(O,OH)14 C 2/m 2/m

Other Shuiskite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

See Also:

Links to other databases for Shuiskite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Shuiskite

Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2•(H2O)
Dana No: 58.02.02.09 Strunz No: 09.BG.20
Locality:

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