Bario-olgite Mineral Data

Bario-olgite Mineral Data

General Bario-olgite Information

Chemical Formula:

Na(Ba,Sr,Na,REE)PO4

Composition:

Molecular Weight = 223.77 gm

Potassium 0.70 % K 0.84 % K₂O

Barium 28.23 % Ba 31.52 % BaO

Sodium 10.99 % Na 14.82 % Na₂O

Strontium 14.10 % Sr 16.67 % SrO

Calcium 0.18 % Ca 0.25 % CaO

Lanthanum 1.86 % La 2.18 % La₂O₃

Cerium 1.25 % Ce 1.47 % Ce₂O₃

Manganese 0.25 % Mn 0.32 % MnO

Phosphorus 13.84 % P 31.72 % P₂O₅

Oxygen 28.60 % O

______ ______

100.00 % 99.79 % = TOTAL OXIDE

Empirical Formula:

Na_1.07K_0.04La_0.03Ce_0.02Ca_0.01Mn²⁺_0.01Ba_0.46Sr_0.36(PO₄)

Environment:

In the hyperagpaitic Palitra pegmatite. Ba-dominant analogue of olgite.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Mt. Kedykverpakhk, Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the composition and relationship to olgite.

Synonym:

Bari-olgite

Bariolgite

IMA2003-002

Olgite-Ba

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Bario-olgite Crystallography

Axial Ratios:

a:c = 1:1.26725

Cell Dimensions:

a = 5.549, c = 7.032, Z = 2; V = 187.52 Den(Calc)= 3.96

Crystal System:

Trigonal - PyramidalH-M Symbol (3) Space Group: P 3

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

By Intensity(I/I_o): 2.774(1)(110), 2.839(1)(012), 3.964(0.6)(011),1.984(0.4)(202), 1.611(0.26)(122), 7.044(0.22)(001), 2.344(0.2)(003),

Physical Properties of Bario-olgite

Cleavage:

None

Color:

Light green.

Density:

Diaphaniety:

Transparent

Fracture:

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

Habit:

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

Habit:

Pyramidal - Crystals are shaped like pyramids.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bario-olgite

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.158,KPDmeas= 0.1564,KC= 0.1589

Optical Data:

Uniaxial (-), e=1.623, w=1.628, bire=0.0050.

Calculated Properties of Bario-olgite

Electron Density:

r_electron=3.62 gm/cc
note: r_Bario-olgite=3.96 gm/cc.

Fermion Index

Fermion Index = 0.06033
Boson Index = 0.93967

Photoelectric:

PE_Bario-olgite= 156.19 barns/electron
U=PE_Bario-olgite x r_electron= 565.47 barns/cc.

Radioactivity:

GRapi = 3,046.59 (Gamma Ray American Petroleum Institute Units)

**Estimated Radioactivity from Bario-olgite** - 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 / 7.84 cm	69,979	1.89E-06	3,046.59	1.00
100 gm / 3.64 cm	6,998	1.89E-07	304.66	0.10
10 gm / 1.69 cm	700	1.89E-08	30.47	0.01
1 gm / 7.84 mm	70	1.89E-09	3.05	0.00
0.1 gm / 3.64 mm	7	1.89E-10	0.30	0.00
0.01 gm / 1.69 mm	1	1.89E-11	0.03	0.00
0.001 gm / 0.78 mm	0	1.89E-12	0.00	0.00

Weight of pure Bario-olgite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.96 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 ( 0.16 % Th) From Sum REE Elements ( 3.11 % REE)

Bario-olgite Classification

Dana Class:

38.1.3.2 (38)Anhydrous Phosphates, etc

(38.1)A+ B++ XO4

(38.1.3)Dana Group

38.1.3.1 Olgite Na(Sr,Ba)PO4 P 3 3

38.1.3.2 Bario-olgite ! Na(Ba,Sr,Na,REE)PO4 P 3 3

Strunz Class:

VII/A.12-70 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of very big size: Ca, Na and andre

VII/A.12 - Monetite - Schultenite series

VII/A.12-10 Monetite CaHPO4 P1 1

VII/A.12-20 Weilite CaHAsO4 P1 1

VII/A.12-30 Phosphammite (NH4)2HPO4 P 2₁/c 2/m

VII/A.12-40 Biphosphammite (NH4,K)H2PO4 I 42d 4 2m

VII/A.12-50 Archerite (K,NH4)H2PO4 I 42d 4 2m

VII/A.12-60 Olgite Na(Sr,Ba)PO4 P 3 3

VII/A.12-70 Bario-olgite Na(Ba,Sr,Na,REE)PO4 P 3 3

Other Bario-olgite Information

References:

NAME( CanMin, 42:1905) PHYS. PROP.(CanMin, 42:1905) OPTIC PROP.(CanMin, 42:1905)

See Also:

Links to other databases for Bario-olgite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Bario-olgite

Na(Ba,Sr,Na,REE)PO4
Dana No: 38.1.3.2 Strunz No: VII/A.12-70
Locality:

Notes: