Hingganite-(Yb) Mineral Data

Hingganite-(Yb) Mineral Data +

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General Hingganite-(Yb) Information

Chemical Formula:

(Yb,Y)2([ ])Be2Si2O8(OH)2

Composition:

Molecular Weight = 453.70 gm

Yttrium 9.80 % Y 12.44 % Y₂O₃

Ytterbium 38.14 % Yb 43.43 % Yb₂O₃

Beryllium 3.97 % Be 11.03 % BeO

Silicon 12.38 % Si 26.49 % SiO₂

Hydrogen 0.44 % H 3.97 % H₂O

Oxygen 35.26 % O

______ ______

100.00 % 97.36 % = TOTAL OXIDE

Empirical Formula:

YbY_0.5Be₂Si₂O₈(OH)₂

Environment:

Found in an amazonite pegmatite on plumbomicrolite and violet fluorite as a product of very late-stage replacement reactions.

IMA Status:

Approved IMA 1983

Locality:

Ploskororskaya, Keivy district, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for it's relationship to hingganite.

Synonym:

ICSD 20628

PDF 35-705

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Hingganite-(Yb) Crystallography

Axial Ratios:

a:b:c =1.2998:1:0.6231

Cell Dimensions:

a = 9.888, b = 7.607, c = 4.74, Z = 2; beta = 90.45° V = 356.52 Den(Calc)= 4.23

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.85(1), 3.13(1), 2.572(0.8),

Physical Properties of Hingganite-(Yb)

Cleavage:

None

Color:

Colorless.

Density:

4.83

Diaphaniety:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Hingganite-(Yb)

Gladstone-Dale:

CI meas= 0.042 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.094 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1752,KPDmeas= 0.1534,KC= 0.1601

Optical Data:

Biaxial (+), a=1.725, b=1.738, g=1.76, bire=0.0350, 2V(Calc)=76, 2V(Meas)=65.

Calculated Properties of Hingganite-(Yb)

Electron Density:

r_electron=4.42 gm/cc
note: r_{Hingganite-(Yb)}=4.83 gm/cc.

Fermion Index

Fermion Index = 0.162
Boson Index = 0.838

Photoelectric:

PE_{Hingganite-(Yb)}= 383.32 barns/electron
U=PE_{Hingganite-(Yb)} x r_electron=1,693.54 barns/cc.

Radioactivity:

GRapi = 37,212.54 (Gamma Ray American Petroleum Institute Units)

Hingganite-(Yb) 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) 817.38 ±204.34 grams of pure Hingganite-(Yb) .

**Estimated Radioactivity from Hingganite-(Yb)** - 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 / 7.34 cm	854,334	2.31E-05	37,212.54	12.23
100 gm / 3.41 cm	85,433	2.31E-06	3,721.25	1.22
10 gm / 1.58 cm	8,543	2.31E-07	372.13	0.12
1 gm / 7.34 mm	854	2.31E-08	37.21	0.01
0.1 gm / 3.41 mm	85	2.31E-09	3.72	0.00
0.01 gm / 1.58 mm	9	2.31E-10	0.37	0.00
0.001 gm / 0.73 mm	1	2.31E-11	0.04	0.00

Weight of pure Hingganite-(Yb) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.83 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 ( 1.91 % Th) From Sum REE Elements (38.14 % REE)

Hingganite-(Yb) Classification

Dana Class:

54.2.1a.4 (54)Nesosilicate Borosilicates and Some Beryllosilicates

(54.2)with B in [4] coordination

(54.2.1a)Datolite group (Datolite series)

54.2.1a.1 Datolite CaBSiO4(OH) P 2₁/c 2/m

54.2.1a.2 Hingganite-(Ce) Ce2Be2(SiO4)2(OH)2 P 2₁/a 2/m

54.2.1a.3 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 2₁/a 2/m

54.2.1a.4 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 2₁/a 2/m

54.2.1a.5 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 2₁/a 2/m

Strunz Class:

VIII/B.29-90 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with beryllium and boron

VIII/B.29 - Datolite/Gadolinite group

VIII/B.29-10 Datolite CaBSiO4(OH) P 2₁/c 2/m

VIII/B.29-20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3·(H2O) P 2₁/c 2/m

VIII/B.29-30 Homilite Ca2(Fe,Mg)B2Si2O10 P 2₁/a 2/m

VIII/B.29-35 Vistepite Mn4SnB2(SiO4)4(OH)2 P1 1

VIII/B.29-40 Minasgeraisite-(Y) CaY2Be2Si2O10 P 2₁/a 2/m

VIII/B.29-50 Gadolinite-(Y) Y2FeBe2Si2O10 P 2₁/a 2/m

VIII/B.29-60 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 2₁/c 2/m

VIII/B.29-70 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 2₁/a 2/m

VIII/B.29-80 Hingganite-(Ce) Ce2Be2(SiO4)2(OH)2 P 2₁/a 2/m

VIII/B.29-90 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 2₁/a 2/m

VIII/B.29-100 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 2₁/a 2/m

Other Hingganite-(Yb) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Hingganite-(Yb) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 -École des Mines de Paris

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Hingganite-(Yb)

(Yb,Y)2([ ])Be2Si2O8(OH)2
Dana No: 54.2.1a.4 Strunz No: VIII/B.29-90
Locality:

Notes: