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Leonite Mineral Data

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General Leonite Information

Help on Chemical  Formula: Chemical Formula: K2Mg(SO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 366.69 gm
   Potassium  21.32 %  K    25.69 % K2O
   Magnesium   6.63 %  Mg   10.99 % MgO
   Hydrogen    2.20 %  H    19.65 % H2O
   Sulfur     17.49 %  S    43.67 % SO3
   Oxygen     52.36 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K2Mg(SO4)2•4(H2O)
Help on Environment: Environment: Secondary mineral of metamorphic origin in marine salt deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1896
Help on Locality: Locality: Leopoldshall, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Leo Strippelmann, Director of the salt works at Westeregeln, Germany.
Help on Name Pronunciation: Name Pronunciation: Leonite Say LEONITE
Help on Synonym: Synonym: ICSD 30991
  PDF 21-995
 

Leonite Image

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  Leonite

Comments: Translucent pale yellow crystalline massive leonite, with white alteration coating.
Location: Near Carlsbad, Eddy County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Leonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2373:1:1.0378
Help on Cell Dimensions: Cell Dimensions: a = 11.78, b = 9.52, c = 9.88, Z = 4; beta = 95.29° V = 1,103.28 Den(Calc)= 2.21
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.87(1), 2.371(0.5), 1.946(0.45),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

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

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Physical Properties of Leonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Light yellow.
Help on Density: Density: 2.201
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Vitreous - Waxy
Help on Streak: Streak: white
 

Optical Properties of Leonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2184,KPDmeas= 0.2193,KC= 0.2164
Ncalc = 1.48
Help on Optical Data: Optical Data: Biaxial (+), a=1.479, b=1.482, g=1.487, bire=0.0080, 2V(Calc)=76, 2V(Meas)=90.
 

Calculated Properties of Leonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.24 gm/cc
note: Specific Gravity of Leonite =2.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082201323
Boson Index = 0.9917798677
Help on Photoelectric: Photoelectric: PELeonite = 3.33 barns/electron
U=PELeonite x relectron= 7.47 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 312.12 (Gamma Ray American Petroleum Institute Units)
Concentration of Leonite per GRapi unit = 0.32 (%)

Estimated Radioactivity from Leonite - barely detectable

 

Leonite Classification

Help on  Dana Class: Dana Class: 29.03.03.03 (29)Hydrated Acid and Sulfates
  (29.03)where (A+)2 B (XO4)2 � x(H2O)
  (29.03.03)Blodite Group
 
29.03.03.01 Blodite Na2Mg(SO4)2•4(H2O) P 21/a 2/m
 
29.03.03.02 Nickelblodite Na2(Ni,Mg)(SO4)2•4(H2O) P 21/a 2/m
 
29.03.03.03 Leonite K2Mg(SO4)2•4(H2O) C 2/m 2/m
 
29.03.03.04 Mereiterite! K2Fe(SO4)2•4(H2O) C 2/m 2/m
 
29.03.03.05 Changoite! Na2Zn(SO4)2•4(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 07.CC.55 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
 
07.CC.55 Mereiterite! K2Fe(SO4)2•4(H2O) C 2/m 2/m
 
07.CC.55 Leonite K2Mg(SO4)2•4(H2O) C 2/m 2/m
 

Other Leonite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Leonite :
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 Leonite Specimen Label here :

Leonite

K2Mg(SO4)2•4(H2O)
Dana No: 29.03.03.03 Strunz No: 07.CC.55
Locality:

 

Notes:

 

 
   
 


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