Mineralogy Database

Kemmlitzite Mineral Data

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General Kemmlitzite Information

Help on Chemical  Formula: Chemical Formula: (Sr,Ce)Al3(AsO4)(SO4)(OH)6
Help on Composition: Composition: Molecular Weight = 517.07 gm
   Strontium    6.78 %  Sr    8.02 % SrO
   Calcium      0.78 %  Ca    1.08 % CaO
   Cerium      10.84 %  Ce   12.70 % Ce2O3
   Magnesium    0.47 %  Mg    0.78 % MgO
   Aluminum    14.61 %  Al   27.61 % Al2O3
   Iron         1.08 %  Fe    1.54 % Fe2O3
   Silicon      1.09 %  Si    2.32 % SiO2
   Arsenic     14.49 %  As   22.23 % As2O5
   Phosphorus   2.40 %  P     5.49 % P2O5
   Hydrogen     1.36 %  H    12.19 % H2O
   Sulfur       2.48 %  S     6.19 % SO3
   Oxygen      43.63 %  O
              ______        ______ 
              100.00 %      100.15 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr0.4Ce0.4Mg0.1Ca0.1Al2.8Fe3+0.1(AsO4)(PO4)0.4(SO4)0.4(SiO4)0.2(OH)5.2´┐Ż0.9(H2O)
Help on Environment: Environment: Kaolinized quartz porphyry, in the heavy mineral fraction.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Kemmlitz kaolin depoosit, near Oschatz, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Kemmlitzite + Pronunciation Say KEMMLITZITE
 

Kemmlitzite Image

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  Kemmlitzite

Comments: Tan granular kemmlitzite in sand.
Location: Kemmlitz Deposit, Oschatz, Sachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kemmlitzite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.33455
Help on Cell Dimensions: Cell Dimensions: a = 7.072, c = 16.51, Z = 3; V = 715.09 Den(Calc)= 3.60
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.959(1), 1.903(0.9), 3.514(0.9),
 

Physical Properties of Kemmlitzite

Help on Cleavage: Cleavage: {0001} Poor
Help on Color: Color: Colorless, Gray brown, Light brown.
Help on Density: Density: 3.63
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Pseudo Rhombohedral - Crystals show a rhombohedral outline.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Kemmlitzite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1956,KPDmeas= 0.1939,KC= 0.1991
Ncalc = 1.72
Help on Optical Data: Optical Data: Uniaxial (+), w=1.701, e=1.707, bire=0.0060.
 

Calculated Properties of Kemmlitzite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Kemmlitzite =3.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0063590884
Boson Index = 0.9936409116
Help on Photoelectric: Photoelectric: PEKemmlitzite = 70.48 barns/electron
U=PEKemmlitzite x relectron= 243.97 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 11,117.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Kemmlitzite per GRapi unit = 89.95 (PPM)

Kemmlitzite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Kemmlitzite - weak
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 / 8.10 cm 242,798 6.56E-06 11,117.58 3.66
100 gm / 3.76 cm 24,280 6.56E-07 1,111.76 0.37
10 gm / 1.74 cm 2,428 6.56E-08 111.18 0.04
1 gm / 8.10 mm 243 6.56E-09 11.12 0.00
0.1 gm / 3.76 mm 24 6.56E-10 1.11 0.00
0.01 gm / 1.74 mm 2 6.56E-11 0.11 0.00
0.001 gm / 0.81 mm 0 6.56E-12 0.01 0.00

Weight of pure Kemmlitzite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.60 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
Estimated Thorium Activity ( 0.54 % Th) From Sum REE Elements (10.84 % REE)
 

Kemmlitzite Classification

Help on  Dana Class: Dana Class: 43.04.01.07 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.01)Beudantite Group
 
43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
Help on  Strunz Class: Strunz Class: 08.BL.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m
 
08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m
 
08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 
08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m
 
08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m
 

Other Kemmlitzite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Kemmlitzite :
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

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

Kemmlitzite

(Sr,Ce)Al3(AsO4)(SO4)(OH)6
Dana No: 43.04.01.07 Strunz No: 08.BL.05
Locality:

 

Notes:

 

 
   
 


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