Kamphaugite-(Y) Mineral Data

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General Kamphaugite-(Y) Information

Chemical Formula:

(Ca1.84REEx)(Y1.46REE0.54-x)(CO3)4(OH)1.65•2(H2O)

Composition:

Molecular Weight = 585.44 gm

Calcium 12.60 % Ca 17.62 % CaO

La,Ce,Pr,Nd,Sm, 13.28 % RE 15.50 % REE₂O₃

Yttrium 22.17 % Y 28.16 % Y₂O₃

Hydrogen 0.97 % H 8.69 % H₂O

Carbon 8.21 % C 30.07 % CO₂

Oxygen 42.77 % O

______ ______

100.00 % 100.04 % = TOTAL OXIDE

Empirical Formula:

Ca_1.84Y_1.46REE_0.54(CO₃)₄(OH)_1.65•2(H₂O)

Environment:

Secondary mineral in REE-bearing granites or alteration product of kuliokite-(Y).

IMA Status:

Approved IMA 1993

Locality:

Hortekollen, Hoydalen, Oslo region, Norway Link to MinDat.org Location Data.

Name Origin:

Named for Erling Kamphaug (1931-), Norwegian mineral collector.

Name Pronunciation:

Kamphaugite-(Y) + Pronunciation

Synonym:

ICSD 66680

IMA1987-043

PDF 46-1399

Kamphaugite-(Y) Image

Images:

Kamphaugite-(Y)

Comments: Small white crystals of kamphaugite-(Y).
Location: Tørdal (Hjøndalen), Telemark, Norway. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Kamphaugite-(Y) Crystallography

Axial Ratios:

a:c = 1:2.93153

Cell Dimensions:

a = 7.434, c = 21.793, Z = 4; V = 1,204.38 Den(Calc)= 3.23

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 4₁2₁2

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

By Intensity(I/I_o): 6.14(1), 4.381(0.8), 3.516(0.6),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Romming C , Kocharian A K , Raade G , European Journal of Mineralogy , 5 (1993) p.685-690, The crystal structure of kamphaugite-(Y)

Physical Properties of Kamphaugite-(Y)

Cleavage:

None

Color:

Brown, Colorless, White, Light yellow.

Density:

3.19

Diaphaneity:

Transparent

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kamphaugite-(Y)

Gladstone-Dale:

CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1997,KPDmeas= 0.2022,KC= 0.1981
Ncalc = 1.63 - 1.64

Optical Data:

Uniaxial (-), e=1.627, w=1.663, bire=0.0360.

Calculated Properties of Kamphaugite-(Y)

Electron Density:

Bulk Density (Electron Density)=3.11 gm/cc
note: Specific Gravity of Kamphaugite-(Y) =3.23 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Kamphaugite-(Y)}= 107.03 barns/electron
U=PE_{Kamphaugite-(Y)} x r_electron= 332.49 barns/cc.

Radioactivity:

GRapi = 13,675.32 (Gamma Ray American Petroleum Institute Units)
Concentration of Kamphaugite-(Y) per GRapi unit = 73.12 (PPM)

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

**Estimated Radioactivity from Kamphaugite-(Y)** - 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 / 8.39 cm	298,594	8.07E-06	13,675.32	4.50
100 gm / 3.90 cm	29,859	8.07E-07	1,367.53	0.45
10 gm / 1.81 cm	2,986	8.07E-08	136.75	0.04
1 gm / 8.39 mm	299	8.07E-09	13.68	0.00
0.1 gm / 3.90 mm	30	8.07E-10	1.37	0.00
0.01 gm / 1.81 mm	3	8.07E-11	0.14	0.00
0.001 gm / 0.84 mm	0	8.07E-12	0.01	0.00

Weight of pure Kamphaugite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.23 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 ( 0.66 % Th) From Sum REE Elements (13.28 % REE)

Kamphaugite-(Y) Classification

Dana Class:

16b.01.07.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.01)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1

(16b.01.07)Dana Group

16b.01.07.01 Kamphaugite-(Y) (Ca1.84REEx)(Y1.46REE0.54-x)(CO3)4(OH)1.65•2(H2O) P 4₁2₁2 4 2 2

Strunz Class:

05.DC.10 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DC -With large cations

05.DC.10 Kamphaugite-(Y) (Ca1.84REEx)(Y1.46REE0.54-x)(CO3)4(OH)1.65•2(H2O) P 4₁2₁2 4 2 2

Other Kamphaugite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Kamphaugite-(Y) :
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
13 - WWW-MINCRYST

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Print or Cut-and-Paste your Kamphaugite-(Y) Specimen Label here :

Kamphaugite-(Y)

(Ca1.84REEx)(Y1.46REE0.54-x)(CO3)4(OH)1.65•2(H2O)
Dana No: 16b.01.07.01 Strunz No: 05.DC.10
Locality:

Notes: