Podlesnoite Mineral Data

General Podlesnoite Information

Chemical Formula:

BaCa2(CO3)2F2

Composition:

Molecular Weight = 379.11 gm

Barium 36.95 % Ba 41.25 % BaO

Sodium 0.06 % Na 0.08 % Na₂O

Strontium 0.12 % Sr 0.14 % SrO

Calcium 20.93 % Ca 29.29 % CaO

Iron 0.29 % Fe 0.38 % FeO

Carbon 6.30 % C 23.10 % CO₂

Oxygen 25.32 % O

Fluorine 10.02 % F 10.02 % F

- % F -4.22 % -O=F₂

______ ______

100.00 % 100.04 % = TOTAL OXIDE

Empirical Formula:

Ba_1.02Ca_1.98Fe²⁺_0.02Na_0.01Sr_0.005C_1.99O₆F₂

Environment:

Found in a small hydrothermal body composed primarily of natrolite. New structure type.

IMA Status:

Approved IMA 2006 (Dana # Added)

Locality:

Kirovskii mine, Mt. Kukisvumchorr, Khibiny massif, Kola Peninsula, Russia Link to MinDat.org Location Data.

Name Origin:

Named (pronounced "pod-lez'-no-ite") for Aleksandr Semenovich Podlesnyi (born 1948), Russian amateur mineralogist and prominent mineral collector, in recognition of his significant contributions to the mineralogy of the

Synonym:

IMA2006-033

Podlesnoite Image

Images:

Podlesnoite

Comments: Tabular, prismatic podlesnooite crystals up to 2 mm in radiating groups and clusters with double terminations.
Location: Kirovskii Mine, Mt. Kukisvumchorr, Chibiny, Kola Peninsula, Russia. Scale: Crystal size 1 mm.
© Diederik Visser

Podlesnoite Crystallography

Axial Ratios:

a:b:c =2.1383:1:1.6152

Cell Dimensions:

a = 12.501, b = 5.846, c = 9.443, Z = 4; V = 690.10 Den(Calc)= 3.65

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm

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

By Intensity(I/I_o): 3.527(1), 3.397(0.71), 2.313(0.43),1.94(0.4), 1.948(0.39), 2.302(0.22), 5.303(0.21), 2.609(0.2),

Crystal Structure:

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Zubkova N V , Pushcharovsky D Y , Pekov I V , Rabadanov M K , Zeitschrift fur Kristallographie , 222 (2007) p.474-476, The crystal structure of podlesnoite, BaCa2(CO3)2F2, Locality: Kirovskii mine, Khibiny alkaline massif, Kola Peninsula, Russia

Physical Properties of Podlesnoite

Cleavage:

None

Color:

White.

Density:

3.62

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

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

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

Fluorescent, Short UV=pinkish orange, Long UV=weak lilac blue.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Podlesnoite

Gladstone-Dale:

CI meas= 0.059 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1576,KPDmeas= 0.1589,KC= 0.1688
Ncalc = 1.61 - 1.62

Optical Data:

Biaxial (-), a=1.5, b=1.612, g=1.614, bire=0.1140

Calculated Properties of Podlesnoite

Electron Density:

Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Podlesnoite =3.62 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Podlesnoite= 163.10 barns/electron
U=PE_Podlesnoite x rElectron Density= 546.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Podlesnoite is Not Radioactive

Podlesnoite Classification

Dana Class:

16a.05.05.02 (16a)Carbonates - Hydroxyl or Halogen

(16a.05)with miscellaneous formulae

(16a.05.05)Dana Group

16a.05.05.01 Rouvilleite Na3Ca2(CO3)3F Cc,C 2/c Mono

16a.05.05.02 Podlesnoite! BaCa2(CO3)2F2 C mcm 2/m 2/m 2/m

Strunz Class:

05.BC.15 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BC -With alkali-earth cations

05.BC.15 Podlesnoite! BaCa2(CO3)2F2 C mcm 2/m 2/m 2/m

Other Podlesnoite Information

References:

NAME( MinRec, Mar08) PHYS. PROP.(MinRec, Mar08) OPTIC PROP.(MinRec, Mar08)

See Also:

Links to other databases for Podlesnoite :
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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Ask about Podlesnoite here :
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Print or Cut-and-Paste your Podlesnoite Specimen Label here :

Podlesnoite

BaCa2(CO3)2F2
Dana No: 16a.05.05.02 Strunz No: 05.BC.15
Locality:

Notes: