Braitschite-(Ce) Mineral Data

General Braitschite-(Ce) Information

Chemical Formula: (Ca,Na2)7(Ce,La)2B22O43•7(H2O) Composition: Molecular Weight = 1,623.88 gm    Sodium      5.66 %  Na    7.63 % Na₂O    Calcium    12.34 %  Ca   17.27 % CaO    Lanthanum   4.28 %  La    5.02 % La₂O₃    Cerium     12.94 %  Ce   15.16 % Ce₂O₃    Boron      14.65 %  B    47.16 % B₂O₃    Hydrogen    0.87 %  H     7.77 % H₂O    Oxygen     49.26 %  O              ______        ______               100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Ca₅Na₄Ce_1.5La_0.5B₂₂O₄₃•7(H₂O) Environment: Marine evaporite deposits. IMA Status: Approved IMA 1968 Locality: Cane Creek potash mine, near Moab, Grand County, Utah, USA. Link to MinDat.org Location Data. Name Origin: Named for Otto Braitsch (1921-1966), German mineralogist. Name Pronunciation: Braitschite-(Ce) + Pronunciation  

Braitschite-(Ce) Image

Images:

Braitschite-(Ce) Comments: Aggregates of white to red-brown platy Braitschite-(Ce) in halite matrix. Location: Cane Creek near Moab, Grand Co., Utah, USA. Scale: Specimen Size 2x2.5 cm. © Diederik Visser

Braitschite-(Ce) Crystallography

Axial Ratios: a:c = 1:0.60686 Cell Dimensions: a = 12.156, c = 7.377, Z = 1; V = 944.04 Den(Calc)= 2.86 Crystal System: HexagonalSpace Group: Unk X Ray Diffraction: By Intensity(I/I_o): 4.283(1), 3.021(0.92), 10.52(0.54),  

Physical Properties of Braitschite-(Ce)

Color: Colorless, White, Pink. Density: 2.903 Diaphaneity: Transparent Habit: Hexagonal - Six-sided crystal shape in cross-section or habit. Habit: Microscopic Crystals - Crystals visible only with microscopes. Habit: Platy - Sheet forms (e.g. micas). Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Braitschite-(Ce)

Gladstone-Dale: CI meas= -0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.226,KPDmeas= 0.2227,KC= 0.2078
Ncalc = 1.59 - 1.6 Optical Data: Uniaxial (+), w=1.646, e=1.647, bire=0.0010.  

Calculated Properties of Braitschite-(Ce)

Electron Density: Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Braitschite-(Ce) =2.90 gm/cc.
Fermion Index: Fermion Index = 0.02
Boson Index = 0.98 Photoelectric: PE_{Braitschite-(Ce)} = 82.82 barns/electron
U=PE_{Braitschite-(Ce)} x r_electron= 232.00 barns/cc.
Radioactivity:

GRapi = 17,724.30 (Gamma Ray American Petroleum Institute Units)
Concentration of Braitschite-(Ce) per GRapi unit = 56.42 (PPM)

Braitschite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Braitschite-(Ce) - weak

Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.70 cm	385,720	1.04E-05	17,724.30	5.83
100 gm / 4.04 cm	38,572	1.04E-06	1,772.43	0.58
10 gm / 1.87 cm	3,857	1.04E-07	177.24	0.06
1 gm / 8.70 mm	386	1.04E-08	17.72	0.01
0.1 gm / 4.04 mm	39	1.04E-09	1.77	0.00
0.01 gm / 1.87 mm	4	1.04E-10	0.18	0.00
0.001 gm / 0.87 mm	0	1.04E-11	0.02	0.00

Weight of pure Braitschite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.90 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 ( 0.86 % Th) From Sum REE Elements (17.22 % REE)

 

Braitschite-(Ce) Classification

Dana Class: 26.07.06.01 (26)Hydrated Borates Containing Hydroxyl or Halogen   (26.07)Dana Type   (26.07.06)Dana Group  

26.07.06.01 Braitschite-(Ce) (Ca,Na2)7(Ce,La)2B22O43•7(H2O) Unk Hex

Strunz Class: 06.HA.10 06 - BORATES   06.H - Unclassified Borates   06.HA -Unclassified borates  

06.HA.10 Braitschite-(Ce) (Ca,Na2)7(Ce,La)2B22O43•7(H2O) Unk Hex

 

Other Braitschite-(Ce) Information

References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Braitschite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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