Mineralogy Database

Quenstedtite Mineral Data

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General Quenstedtite Information

Help on Chemical Formula: Chemical Formula: Fe+++2(SO4)3•10(H2O)
Help on Composition: Composition: Molecular Weight = 580.04 gm
   Iron      19.26 %  Fe   27.53 % Fe2O3
   Hydrogen   3.48 %  H    31.06 % H2O
   Sulfur    16.58 %  S    41.41 % SO3
   Oxygen    60.68 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+2(SO4)3•10(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1889
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the German mineralogist, F. A. Quenstedt (1809-1889).
Help on Name Pronunciation: Name Pronunciation: Quenstedtite + Pronunciation Say QUENSTEDTITE
Help on Synonym: Synonym: ICSD 6223
  PDF 17-160
 

Quenstedtite Image

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  Quenstedtite

Comments: White crystalline quenstedtite crust.
Location: Richelsdorf, Hessen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Quenstedtite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.262:1:0.277
Help on Cell Dimensions: Cell Dimensions: a = 6.184, b = 23.6, c = 6.539, Z = 2; alpha = 94.18°, beta = 101.73°, gamma = 96.27° V = 926.33 Den(Calc)= 2.08
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.109(1), 4.217(0.87), 5.837(0.66),
Help on Forms: Forms:

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Help on Above

Forms: ( 0 1 0) ( 1 1 0) ( 1 2 0) ( 0 3 1) ( 0 2 1) ( 0 1 1) ( 1 0 0)

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Physical Properties of Quenstedtite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: White, Light violet, Red violet.
Help on Density: Density: 2.14
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light violet blue
 

Optical Properties of Quenstedtite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2736,KPDmeas= 0.2659,KC= 0.2656
Ncalc = 1.55 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.547, b=1.566, g=1.594, bire=0.0470, 2V(Calc)=82, 2V(Meas)=70.
 

Calculated Properties of Quenstedtite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Quenstedtite =2.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0056226963
Boson Index = 0.9943773037
Help on Photoelectric: Photoelectric: PEQuenstedtite = 6.59 barns/electron
U=PEQuenstedtite x rElectron Density= 14.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Quenstedtite is Not Radioactive
 

Quenstedtite Classification
Help on Dana Class: Dana Class: 29.08.05.01 (29)Hydrated Acid and Sulfates
  (29.08)where (A)2 (XO4)3 � x(H2O)
  (29.08.05)Dana Group
 
29.08.05.01 Quenstedtite Fe2(SO4)3•10(H2O) P1 1
Help on Strunz Class: Strunz Class: 07.CB.65 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CB -With only medium-sized cations
 
07.CB.65 Quenstedtite Fe2(SO4)3•10(H2O) P1 1
 

Other Quenstedtite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Quenstedtite :
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
15 - WWW-MINCRYST

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Quenstedtite

Fe+++2(SO4)3•10(H2O)
Dana No: 29.08.05.01 Strunz No: 07.CB.65
Locality:

 

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