Adamsite-(Y) Mineral Data

General Adamsite-(Y) Information

Chemical Formula:

NaY(CO3)2•6(H2O)

Composition:

Molecular Weight = 344.24 gm

Sodium 6.68 % Na 9.00 % Na₂O

Gadolinium 1.83 % Gd 2.11 % Gd₂O₃

Dysprosium 4.72 % Dy 5.42 % Dy₂O₃

Yttrium 18.08 % Y 22.96 % Y₂O₃

Erbium 2.43 % Er 2.78 % Er₂O₃

Hydrogen 3.51 % H 31.40 % H₂O

Carbon 6.98 % C 25.57 % CO₂

Oxygen 55.77 % O

______ ______

100.00 % 99.23 % = TOTAL OXIDE

Empirical Formula:

NaY_0.7Dy_0.1Er_0.05Gd_0.04(CO₃)₂•6(H₂O)

Environment:

Late-stage, low-temperature hydrothermal phase within cavities in an alkaline pegmatite dike.

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Poudrette quarry, Mont Saint-Hilaire, Quebec. Link to MinDat.org Location Data.

Name Origin:

Named for Professor Frank Dawson Adams (1859-1942) of McGill University, Montreal, Quebec.

Synonym:

ICSD 90832

IMA1999-020

Adamsite-(Y) Image

Images:

Adamsite-(Y)

Comments: Sprays of adamsite-(Y) crystals on matrix.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 1.5 cm.
© John Veevaert

Adamsite-(Y) Crystallography

Axial Ratios:

a:b:c =0.4799:1:1.0132

Cell Dimensions:

a = 6.262, b = 13.047, c = 13.22, Z = 4; alpha = 91.17°, beta = 103.7°, gamma = 89.99° V = 1,049.13 Den(Calc)= 2.18

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 12.81(1)(001), 6.45(0.7)(002), 2.571(0.6)(005,043),4.29(0.6)(003), 4.456(0.6)(121,120,1202.05(0.5), 2.869(0.3), 3.267(0.25),

Physical Properties of Adamsite-(Y)

Cleavage:

{001} Perfect, {100} Good, {010} Good

Color:

Colorless, White, Pale pink, Pale purple.

Diaphaneity:

Translucent to transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Adamsite-(Y)

Gladstone-Dale:

CI calc= -0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2369,KC= 0.2287
Ncalc = 1.5

Optical Data:

Biaxial (+), a=1.48, b=1.498, g=1.571, bire=0.0910

Calculated Properties of Adamsite-(Y)

Electron Density:

Bulk Density (Electron Density)=2.16 gm/cc
note: Specific Gravity of Adamsite-(Y) =2.18 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Adamsite-(Y)= 87.57 barns/electron
U=PE_Adamsite-(Y) x r_electron= 189.50 barns/cc.

Radioactivity:

GRapi = 9,505.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Adamsite-(Y) per GRapi unit = 105.20 (PPM)

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

**Estimated Radioactivity from Adamsite-(Y)** - mild
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 / 9.57 cm	201,090	5.43E-06	9,505.70	3.13
100 gm / 4.44 cm	20,109	5.43E-07	950.57	0.31
10 gm / 2.06 cm	2,011	5.43E-08	95.06	0.03
1 gm / 9.57 mm	201	5.43E-09	9.51	0.00
0.1 gm / 4.44 mm	20	5.43E-10	0.95	0.00
0.01 gm / 2.06 mm	2	5.43E-11	0.10	0.00
0.001 gm / 0.96 mm	0	5.43E-12	0.01	0.00

Weight of pure Adamsite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.18 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 ( 0.45 % Th) From Sum REE Elements ( 8.98 % REE)

Adamsite-(Y) Classification

Dana Class:

15.04.08.01 (15)Hydrated Carbonates

(15.04)Dana Type

(15.04.08)Dana Group

15.04.08.01 Adamsite-(Y)! NaY(CO3)2•6(H2O) P1 1

Strunz Class:

05.CC.30 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CC -With rare-earth elements (REE)

05.CC.30 Adamsite-(Y)! NaY(CO3)2•6(H2O) P1 1

Other Adamsite-(Y) Information

References:

NAME( AmMin, Vol 86, p1112) PHYS. PROP.(AmMin, Vol 86, p1112) OPTIC PROP.(AmMin, Vol 86, p1112)

See Also:

Links to other databases for Adamsite-(Y) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Adamsite-(Y)

NaY(CO3)2•6(H2O)
Dana No: 15.04.08.01 Strunz No: 05.CC.30
Locality:

Notes:

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