Swartzite Mineral Data

General Swartzite Information

Chemical Formula:

CaMg(UO2)(CO3)3•12(H2O)

Composition:

Molecular Weight = 730.62 gm

Calcium 5.49 % Ca 7.68 % CaO

Magnesium 3.33 % Mg 5.52 % MgO

Uranium 32.58 % U 36.96 % UO₂

Hydrogen 3.31 % H 29.59 % H₂O

Carbon 4.93 % C 18.07 % CO₂

Oxygen 50.37 % O

______ ______

100.00 % 97.81 % = TOTAL OXIDE

Empirical Formula:

CaMg(UO₂)(CO₃)₃•12(H₂O)

Environment:

Mine wall efflorescence.

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Hillside mine, Yavapai County, Arizona, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Charles K. Swartz (1861-1949), geologist and mineralogist, John Hopkins University.

Name Pronunciation:

Swartzite + Pronunciation

Synonym:

ICSD 29557

PDF 4-111

Swartzite Image

Images:

Swartzite

Comments: Pale yellow powdery swartzite, intermixed with gypsum on schist rock.
Location: Hillside Mine, Bagdad, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Swartzite Crystallography

Axial Ratios:

a:b:c =0.7554:1:0.4395

Cell Dimensions:

a = 11.12, b = 14.72, c = 6.47, Z = 2; beta = 99.433° V = 1,044.73 Den(Calc)= 2.32

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.5(1), 8.76(1), 7.31(0.9),

Physical Properties of Swartzite

Color:

Yellowish, Yellowish white, Light green.

Density:

2.3

Habit:

Efflorescences - Crystals covering matrix, generally produced from transpiro-evaporation.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Luminescence:

Fluorescent, Short UV=bright green, Long UV=bright green.

Streak:

white

Optical Properties of Swartzite

Gladstone-Dale:

CI meas= -0.082 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2177,KPDmeas= 0.2196,KC= 0.2028
Ncalc = 1.47

Optical Data:

Biaxial (-), a=1.465, b=1.51, g=1.54, bire=0.0750

Pleochroism (x):

colorless.

Pleochroism (y):

yellow.

Pleochroism (z):

yellow.

Calculated Properties of Swartzite

Electron Density:

Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Swartzite =2.32 gm/cc.

Fermion Index:

Fermion Index = 0.0065355828
Boson Index = 0.9934644172

Photoelectric:

PE_Swartzite= 772.43 barns/electron
U=PE_Swartzite x r_electron=1,716.92 barns/cc.

Radioactivity:

GRapi = 2,660,580.35 (Gamma Ray American Petroleum Institute Units)
Concentration of Swartzite per GRapi unit = 375.86 (PPB)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 11.43 ± 2.86 grams of pure Swartzite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1143.2 ±285.81 grams of pure Swartzite .

**Estimated Radioactivity from Swartzite** - very strong
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 / 9.37 cm	58,316,329	1.58E-03	2,660,580.35	874.71
100 gm / 4.35 cm	5,831,633	1.58E-04	266,058.04	87.47
10 gm / 2.02 cm	583,163	1.58E-05	26,605.80	8.75
1 gm / 9.37 mm	58,316	1.58E-06	2,660.58	0.87
0.1 gm / 4.35 mm	5,832	1.58E-07	266.06	0.09
0.01 gm / 2.02 mm	583	1.58E-08	26.61	0.01
0.001 gm / 0.94 mm	58	1.58E-09	2.66	0.00

Weight of pure Swartzite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.32 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

Swartzite Classification

Dana Class:

15.03.03.02 (15)Hydrated Carbonates

(15.03)where A+m B++n (XO3)p ï¿½ x(H2O), (m+n):p = 1:1 and containing U, Th, Zr, Y

(15.03.03)Dana Group

15.03.03.01 Bayleyite Mg2(UO2)(CO3)3•18(H2O) P 2₁/a 2/m

15.03.03.02 Swartzite CaMg(UO2)(CO3)3•12(H2O) P 2₁/m 2/m

Strunz Class:

05.ED.10 05 - CARBONATES (NITRATES)

05.E - Uranyl Carbonates

05.ED -UO2:CO3 = 1:3

05.ED.10 Swartzite CaMg(UO2)(CO3)3•12(H2O) P 2₁/m 2/m

Other Swartzite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Swartzite :
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 - Uranium Minerals
16 - WWW-MINCRYST

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

Swartzite

CaMg(UO2)(CO3)3•12(H2O)
Dana No: 15.03.03.02 Strunz No: 05.ED.10
Locality:

Notes:

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