Quenstedtite Mineral Data

General Quenstedtite Information

Chemical Formula:

Fe+++2(SO4)3•10(H2O)

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

Empirical Formula:

Fe³⁺₂(SO₄)₃•10(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1889

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after the German mineralogist, F. A. Quenstedt (1809-1889).

Name Pronunciation:

Quenstedtite + Pronunciation

Synonym:

ICSD 6223

PDF 17-160

Quenstedtite Image

Images:

Quenstedtite

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

Quenstedtite Crystallography

Axial Ratios:

a:b:c =0.262:1:0.277

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

Crystal System:

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

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

By Intensity(I/I_o): 4.109(1), 4.217(0.87), 5.837(0.66),

Forms:

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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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Crystal Structure:

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Thomas J N , Robinson P D , Fang J H , American Mineralogist , 59 (1974) p.582-586, Crystal structures and mineral chemistry of hydrated ferric sulfates. IV. The, crystal structure of quenstedtite

Physical Properties of Quenstedtite

Cleavage:

{010} Perfect

Color:

White, Light violet, Red violet.

Density:

2.14

Diaphaneity:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

light violet blue

Optical Properties of Quenstedtite

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

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

Electron Density:

Bulk Density (Electron Density)=2.18 gm/cc
note: Specific Gravity of Quenstedtite =2.14 gm/cc.

Fermion Index:

Fermion Index = 0.0056226963
Boson Index = 0.9943773037

Photoelectric:

PE_Quenstedtite= 6.59 barns/electron
U=PE_Quenstedtite x rElectron Density= 14.40 barns/cc.

Radioactivity:

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

Quenstedtite Classification

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

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

References:

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

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

Quenstedtite

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

Notes: