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. Olgite is now a series name for bario- and strontio-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 bearing

Olgite I

Bario-olgite Image

Images:

Manaksite Bario-olgite

Comments: Pale brown massive manaksite associated with grayish-green bario-olgite, purple ussingite and colorless serandite.
Location: Palitra pegmatite, Kedykverpakhk Mountain, Lovozero massif, Kola Peninsula, Russia. Scale: See Image.
© Rruff Database

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 - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: P 3m1

$Help on X Ray Diffraction:$ 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:

Diaphaneity:

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
Ncalc = 1.63 - 1.64

Optical Data:

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

Calculated Properties of Bario-olgite

Electron Density:

Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Bario-olgite =3.96 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

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)
Concentration of Bario-olgite per GRapi unit = 328.24 (PPM)

**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:

38.01.03.02 (38)Anhydrous Phosphates, etc

(38.01)A+ B++ XO4

(38.01.03)Dana Group

38.01.03.01 Olgite? Na(Sr,Ba)PO4 P 3m1 3 2/m

38.01.03.02 Bario-olgite! Na(Ba,Sr,Na,REE)PO4 P 3m1 3 2/m

Strunz Class:

08.AC.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.40 Olgite? Na(Sr,Ba)PO4 P 3m1 3 2/m

08.AC.40 Bario-olgite! Na(Ba,Sr,Na,REE)PO4 P 3m1 3 2/m

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 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Bario-olgite

Na(Ba,Sr,Na,REE)PO4
Dana No: 38.01.03.02 Strunz No: 08.AC.40
Locality:

Notes:

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