Zirsinalite Mineral Data

Zirsinalite Mineral Data +

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General Zirsinalite Information

Chemical Formula:

Na6(Ca,Mn,Fe++)Zr[Si6O18]

Composition:

Molecular Weight = 733.35 gm

Sodium 18.81 % Na 25.35 % Na₂O

Calcium 2.73 % Ca 3.82 % CaO

Zirconium 12.44 % Zr 16.80 % ZrO₂

Manganese 2.25 % Mn 2.90 % MnO

Iron 1.52 % Fe 1.96 % FeO

Silicon 22.98 % Si 49.16 % SiO₂

Oxygen 39.27 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₆Ca_0.5Mn²⁺_0.3Fe²⁺_0.2ZrSi₆O₁₈

Environment:

Alteration product of lomonosovite and barian lamprophyllite found in a drill core.

IMA Status:

Approved IMA 1974

Locality:

Mt. Koashva, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its composition (Zircon, Si, Na).

Synonym:

ICSD 200800

PDF 27-670

Zirsinalite Image

Images:

Zirsinalite

Comments: Translucent pale olive-green-colored zirsinalite replacing reddish eudialyte.
Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Zirsinalite Crystallography

Axial Ratios:

a:c = 1:1.27405

Cell Dimensions:

a = 10.29, c = 13.11, Z = 3; V = 1,202.17 Den(Calc)= 3.04

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 1.842(1), 2.637(0.9), 2.569(0.8),

Crystal Structure:

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Pudovkina Z V , Chernitsova N M , Voronkov A A , Pyatenko Yu A , Doklady Akademii Nauk SSSR , 250 (1980) p.865-867, Crystal structure of zirsinalite Na6Ca{Zr(Si6O18)}, Locality: Koashva Mountain, Khibiny Massif, Kola Peninsula, Russia

Physical Properties of Zirsinalite

Cleavage:

None

Color:

Colorless, Pale yellow gray.

Density:

2.9

Diaphaniety:

Transparent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Zirsinalite

Gladstone-Dale:

CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1998,KPDmeas= 0.2095,KC= 0.2033

Optical Data:

Uniaxial (-), e=1.59-1.592, w=1.624, bire=0.0320-0.0340.

Calculated Properties of Zirsinalite

Electron Density:

r_electron=2.96 gm/cc
note: r_Zirsinalite=3.04 gm/cc.

Fermion Index

Fermion Index = 0.02523
Boson Index = 0.97477

Photoelectric:

PE_Zirsinalite= 18.99 barns/electron
U=PE_Zirsinalite x r_electron= 56.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Zirsinalite is Not Radioactive

Zirsinalite Classification

Dana Class:

61.1.2a.4 (61)Cyclosilicate Six-Membered Rings

(61.1)with [Si6O18] rings; possible (OH) and Al substitution

(61.1.2a)Lovozerite group (HEX and HEX-R subgroup)

61.1.2a.1 Lovozerite H4Na2Ca(Zr,Ti)[Si6O18] R 3m 3 2/m

61.1.2a.2 Kazakovite Na6MnTiSi6O18 R 3m 3 2/m

61.1.2a.3 Tisinalite Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18·2(H2O) R 3m 3 2/m

61.1.2a.4 Zirsinalite Na6(Ca,Mn,Fe)Zr[Si6O18] R 3m 3 2/m

61.1.2a.5 Combeite Na2Ca2Si3O9 P 3₂21,P 3₁21 3 2

61.1.2a.6 Kapustinite! Na5.5Mn0.25ZrSi6O16(OH)2 C 2/m 2/m

Strunz Class:

VIII/E.16-40 VIII - Silicates

VIII/E - Cyklosilicates, six rings [Si6O18]12-

VIII/E.16 - Lovozerite group

VIII/E.16-10 Imandrite Na12Ca3Fe2Si12O36 Pnnm 2/m 2/m 2/m

VIII/E.16-20 Kazakovite Na6MnTiSi6O18 R 3m 3 2/m

VIII/E.16-23 Kapustinite! Na5.5Mn0.25ZrSi6O16(OH)2 C 2/m 2/m

VIII/E.16-25 Litvinskite! Na2([],Na,Mn)Zr[Si6O12(OH,O)6] Cm m

VIII/E.16-30 Lovozerite H4Na2Ca(Zr,Ti)[Si6O18] R 3m 3 2/m

VIII/E.16-40 Zirsinalite Na6(Ca,Mn,Fe)Zr[Si6O18] R 3m 3 2/m

VIII/E.16-50 Koashvite Na6(Ca,Mn)(Ti,Fe)Si6O18·(H2O) Pmnb 2/m 2/m 2/m

VIII/E.16-60 Tisinalite Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18·2(H2O) R 3m 3 2/m

VIII/E.16-70 Petarasite Na5Zr2Si6O18(Cl,OH)·2(H2O) P 2₁/m 2/m

Other Zirsinalite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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Zirsinalite

Na6(Ca,Mn,Fe++)Zr[Si6O18]
Dana No: 61.1.2a.4 Strunz No: VIII/E.16-40
Locality:

Notes: