Sylvite Mineral Data + Say SYLVITE


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General Sylvite Information

Help on Chemical  Formula: Chemical Formula: KCl
Help on Composition: Composition: Molecular Weight = 74.55 gm
   Potassium  52.45 %  K    63.18 % K2O
   Chlorine   47.55 %  Cl   47.55 % Cl
                -   %  Cl  -10.73 % -O=Cl2
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KCl
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1832
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Dutch chemist, Sylvia de la Boe (1614-1672).
 

Sylvite Image

Click Here for Larger Sylvite Image in a New Browser Window Images:
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Sylvite

Comments: Translucent sylvite crystal cluster, somewhat deliquescent.
Location: F.O. Kailwerk, Sigmundshall, near Wunstorf, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sylvite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 6.2931, Z = 4; V = 249.23 Den(Calc)= 1.99
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.15(1), 2.22(0.59), 1.82(0.23),
Click Here for Large Sylvite Structure Window Crystal Structure:

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Walker D , Verma P K , Cranswick L M D , Jones R L , Clark S M , Buhre S , American Mineralogist , 89 (2004) p.204-210, Halite-sylvite thermoelasticity, Sample: msl515031, T = 25 C, P = 0.0 kbar, cell volume = 248.61 ang**3

View Additional jPOWD Structure files for Sylvite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [3] [30] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Sylvite

Help on Cleavage: Cleavage: [100] Perfect, [010] Perfect, [001] Perfect
Help on Color: Color: White, Yellowish white, Reddish white, Bluish white, Brownish white.
Help on Density: Density: 1.99
Help on Diaphaniety: Diaphaniety: Transparent
Help on Fracture: Fracture: Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Vitreous - Greasy
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Sylvite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.102 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2462,KPDmeas= 0.2462,KC= 0.2741
Help on Optical Data: Optical Data: Isotropic, n=1.49.
 

Calculated Properties of Sylvite

Help on Electron Density: Electron Density:

relectron=1.92 gm/cc
note: rSylvite =1.99 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00006
Boson Index = 0.99994
Help on Photoelectric: Photoelectric:

PESylvite = 8.47 barns/electron
U=PESylvite x relectron= 16.28 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 730.82 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Sylvite - mild
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 9.86 cm 15,891 4.29E-07 730.82 0.24
100 gm / 4.58 cm 1,589 4.29E-08 73.08 0.02
10 gm / 2.13 cm 159 4.29E-09 7.31 0.00
1 gm / 9.86 mm 16 4.29E-10 0.73 0.00
0.1 gm / 4.58 mm 2 4.29E-11 0.07 0.00
0.01 gm / 2.13 mm 0 4.29E-12 0.01 0.00
0.001 gm / 0.99 mm 0 4.29E-13 0.00 0.00

Weight of pure Sylvite in grams (gm) and Calculated Diameter of a Sphere with a Density of 1.99 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
 

Sylvite Classification

Help on  Dana Class: Dana Class: 9.1.1.2 (9)Anhydrous and Hydrated Halides
  (9.1)where A X
  (9.1.1)Dana Group
 
9.1.1.1 Halite NaCl F m3m 4/m 3 2/m
 
9.1.1.2 Sylvite KCl F m3m 4/m 3 2/m
 
9.1.1.3 Villiaumite NaF F m3m 4/m 3 2/m
 
9.1.1.4 Carobbiite KF F m3m 4/m 3 2/m
 
9.1.1.5 Griceite LiF F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: III/A.02-40 III - Halogenides
  III/A - Simple halogenides, without water Metal : Halogen = 1 : 1
  III/A.02 - Halite series Griceite - Bromargyrite
 
III/A.02-05 Griceite LiF F m3m 4/m 3 2/m
 
III/A.02-10 Villiaumite NaF F m3m 4/m 3 2/m
 
III/A.02-20 Carobbiite KF F m3m 4/m 3 2/m
 
III/A.02-30 Halite NaCl F m3m 4/m 3 2/m
 
III/A.02-40 Sylvite KCl F m3m 4/m 3 2/m
 
III/A.02-50 Chlorargyrite AgCl F m3m 4/m 3 2/m
 
III/A.02-60 Bromargyrite AgBr F m3m 4/m 3 2/m
 

Other Sylvite 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 Sylvite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 - Glendale Community College 8 -Google Images 9 -Google Scholar 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 -University of Minnesota 17 - WWW-MINCRYST 18 -École des Mines de Paris

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

Sylvite

KCl
Dana No: 9.1.1.2 Strunz No: III/A.02-40
Locality:

 

Notes:

 

 
   
 
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