Nikischerite Mineral Data

Nikischerite Mineral Data
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General Nikischerite Information

Help on Chemical Formula: Chemical Formula: NaFe++6Al3(SO4)2(OH)18(H2O)12
Help on Composition: Composition: Molecular Weight = 1,165.46 gm
   Sodium     1.78 %  Na    2.39 % Na2O
   Aluminum   6.95 %  Al   13.12 % Al2O3
   Iron      31.63 %  Fe   40.69 % FeO
   Hydrogen   3.63 %  H    32.46 % H2O
   Sulfur     4.95 %  S    12.37 % SO3
   Oxygen    51.07 %  O
            ______        ______ 
            100.00 %      101.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.9Fe2+6.6Al3(SO4)1.8(OH)18(H2O)12
Help on Environment: Environment: Secondary mineral formed from oxidizing sulfide deposits.
Help on IMA Status: IMA Status: Approved IMA 2001 (Dana # Added)
Help on Locality: Locality: Huanuni Tin Mine, Dalence Province, Oruro Department, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Anthony (Tony) J. Nikischer (1949-), geologist (Excalibur Minerals) who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Nikischerite Say NIKISCHERITE
Help on Synonym: Synonym: IMA2001-039
 

Nikischerite Image

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Nikischerite

Comments: Yellowish green nikischerite on matrix.
Location: Huanuni Mine, Dalence Province, Bolivia. Scale: Crystal size 5 mm.
© Tom Loomis / Dakota Matrix
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Nikischerite

Comments: Tony Nikischer, Chairman of the Board of The Hudson Institute of Mineralogy, president of Excalibur Mineral Corporation, and the person whom nikischerite is named for, kindly provided the pronunciation of the mineral nikischerite.
Location: Executive Inn hotel, Room 128, Tucson, Feburary 9, 2004. Scale: NA.
© Dave Barthelmy

Nikischerite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:3.53721
Help on Cell Dimensions: Cell Dimensions: a = 9.352, c = 33.08, Z = 3; V = 2,505.56 Den(Calc)= 2.32
Help on Crystal System: Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.98(1)(003), 5.539(0.6)(006), 3.674(0.5)(009),1.932(0.3), 2.425(0.3)(036), 2.624(0.25)(033), 2.176(0.2), 4.311(0.2)(113), 2.7(0.1)(030),
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Forms: ( 1 0 0) ( 0 0 1)

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Huminicki D M C , Hawthorne F C , The Canadian Mineralogist , 41 (2003) p.79-82, The crystal structure of nikischerite, NaFeAl3(SO4)2(OH)18(H2O)12,, a mineral of the shigaite group

 

Physical Properties of Nikischerite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Green.
Help on Density: Density: 2.33
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Friable - The crumbly disintegration of earthy materials or highly fractured minerals.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: pale grayish green
 

Optical Properties of Nikischerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2414,KPDmeas= 0.2403,KC= 0.2405
Ncalc = 1.56
Help on Optical Data: Optical Data: Uniaxial (-), w=1.56.
 

Calculated Properties of Nikischerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.35 gm/cc
note: Specific Gravity of Nikischerite =2.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0073267817
Boson Index = 0.9926732183
Help on Photoelectric: Photoelectric: PENikischerite = 9.73 barns/electron
U=PENikischerite x rElectron Density= 22.90 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nikischerite is Not Radioactive
 

Nikischerite Classification
Help on Dana Class: Dana Class: 31.01.02.02 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.01)where (A+ B++)m (XO4)p Zq·x(H2O), where m:p>6:1
  (31.01.02)Dana Group
 
31.01.02.01 Shigaite Mn7Al4(SO4)2(OH)22•8(H2O) R 3 3
 
31.01.02.02 Nikischerite! NaFe6Al3(SO4)2(OH)18(H2O)12 R 3 3
Help on Strunz Class: Strunz Class: 07.DD.35 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DD -With only medium-sized cations; sheets of edge-sharing octahedra
 
07.DD.35 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43•7(H2O) Unk Hex
 
07.DD.35 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16•9(H2O) Unk (HEX-R) Trig
 
07.DD.35 Honessite Ni6Fe2(SO4)(OH)16•4(H2O) R 3m 3 2/m
 
07.DD.35 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2•n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m
 
07.DD.35 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3
 
07.DD.35 Hydrohonessite Ni6Fe2(SO4)(OH)16•7(H2O) Unk Hex
 
07.DD.35 Motukoreaite Na2Mg38Al24(CO3)13(SO4)8(OH)108•56(H2O) R 3m 3 2/m
 
07.DD.35 Mountkeithite (Mg,Ni)11(Fe,Cr)3(SO4,CO3)3.5(OH)24•11(H2O) Unk Hex
 
07.DD.35 Shigaite Mn7Al4(SO4)2(OH)22•8(H2O) R 3 3
 
07.DD.35 Natroglaucocerinite! (Na,Zn,Cu)10Al6(SO4)3(OH)32•18(H2O)? Unk
 
07.DD.35 Wermlandite (Ca,Mg)Mg7(Al,Fe)2(SO4)2(OH)18•12(H2O) P 3c1 3 2/m
 
07.DD.35 Nikischerite! NaFe6Al3(SO4)2(OH)18(H2O)12 R 3 3
 
07.DD.35 Zincaluminite Zn6Al6(SO4)2(OH)26•5(H2O) Unk Hex
 
07.DD.35 Woodwardite Cu4Al2(SO4)(OH)12•2-4(H2O) Unk Hex
 
07.DD.35 Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m
 
07.DD.35 Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2•n(H2O)],x=0.33,n.0.96 P 3 3
 

Other Nikischerite Information
Help on References: References: NAME( MinRec, Vol 34, p 155) PHYS. PROP.(MinRec, Vol 34, p 155) OPTIC PROP.(MinRec, Vol 34, p 155)
Help on See Also: See Also: Links to other databases for Nikischerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Nikischerite Specimen Label here :

Nikischerite

NaFe++6Al3(SO4)2(OH)18(H2O)12
Dana No: 31.01.02.02 Strunz No: 07.DD.35
Locality:

 

Notes: