Sylvite Mineral Data (original) (raw)
General Sylvite Information
Chemical Formula:
KCl
Composition:
Molecular Weight = 74.55 gm
Potassium 52.45 % K 63.18 % K2O
Chlorine 47.55 % Cl 47.55 % Cl
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
KCl
IMA Status:
Valid Species (Pre-IMA) 1832
Locality:
Link to MinDat.org Location Data.
Name Origin:
Named after the Dutch chemist, Sylvia de la Boe (1614-1672).
Name Pronunciation:
Sylvite 
Sylvite Image
Images:
Sylvite Crystallography
Cell Dimensions:
a = 6.2931, Z = 4; V = 249.23 Den(Calc)= 1.99
Crystal System:
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F m3m
X Ray Diffraction:
By Intensity(I/Io): 3.15(1), 2.22(0.59), 1.82(0.23),
Forms:
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| | Forms:( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ------------------------------------------------------------------------------------------------------------------------- |
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
Cleavage:
{100} Perfect, {010} Perfect, {001} Perfect
Color:
White, Yellowish white, Reddish white, Bluish white, Brownish white.
Density:
1.99
Diaphaneity:
Transparent
Fracture:
Brittle - Sectile - Brittle fracture with slightly sectile shavings possible.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Fibrous - Crystals made up of fibers.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Sylvite
Optical Data:
Isotropic, n=1.49.
Calculated Properties of Sylvite
Electron Density:
Bulk Density (Electron Density)=1.92 gm/cc
note: Specific Gravity of Sylvite =1.99 gm/cc.
Fermion Index:
Fermion Index = 0.000062934
Boson Index = 0.999937066
Photoelectric:
PESylvite = 8.47 barns/electron
U=PESylvite x relectron= 16.28 barns/cc.
Radioactivity:
GRapi = 730.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Sylvite per GRapi unit =1,368.32 (PPM)
Estimated Radioactivity from Sylvite 
- mild
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor 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
Dana Class:
09.01.01.02 (09)Anhydrous and Hydrated Halides
(09.01)where A X
(09.01.01)Halite Group
09.01.01.01 Halite NaCl F m3m 4/m 3 2/m
09.01.01.02 Sylvite KCl F m3m 4/m 3 2/m
09.01.01.03 Villiaumite NaF F m3m 4/m 3 2/m
09.01.01.04 Carobbiite KF F m3m 4/m 3 2/m
09.01.01.05 Griceite LiF F m3m 4/m 3 2/m
Strunz Class:
03.AA.20 03 - HALIDES
03.A - Simple Halides, Without H2O
03.AA -M:X = 1:1, 2:3, 3:5, etc.
03.AA.20 Carobbiite KF F m3m 4/m 3 2/m
03.AA.20 Griceite LiF F m3m 4/m 3 2/m
03.AA.20 Halite NaCl F m3m 4/m 3 2/m
03.AA.20 Sylvite KCl F m3m 4/m 3 2/m
03.AA.20 Villiaumite NaF F m3m 4/m 3 2/m
Other Sylvite 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 Sylvite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
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Ask about Sylvite here :
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Print or Cut-and-Paste your Sylvite Specimen Label here :
Sylvite
KCl
Dana No: 09.01.01.02 Strunz No: 03.AA.20
Locality:
Notes: