Calciohilairite Mineral Data

Calciohilairite Mineral Data +

General Calciohilairite Information

Chemical Formula:

CaZrSi3O9·3(H2O)

Composition:

Molecular Weight = 413.60 gm

Calcium 9.69 % Ca 13.56 % CaO

Zirconium 22.06 % Zr 29.79 % ZrO₂

Silicon 20.37 % Si 43.58 % SiO₂

Hydrogen 1.46 % H 13.07 % H₂O

Oxygen 46.42 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaZrSi₃O₉·3(H₂O)

Environment:

In miarolitic cavities in a perialkalic alaskitic border granite of batholith.

IMA Status:

Approved IMA 1988

Locality:

From Washington Pass, on Liberty Bell Mountain, Okanogan Co., Washington, USA. Link to MinDat.org Location Data.

Name Origin:

For the "calcium" content and relation to "hilairite."

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Calciohilairite Crystallography

Axial Ratios:

a:c = 1:0.76674

Cell Dimensions:

a = 20.87, c = 16.002, Z = 24; V = 6,036.01 Den(Calc)= 2.73

Crystal System:

Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: R 32

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

By Intensity(I/I_o): 5.23(1), 3.02(0.34), 1.817(0.31),

Physical Properties of Calciohilairite

Cleavage:

None

Color:

Blue white, White.

Density:

2.68

Diaphaniety:

Translucent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Calciohilairite

Gladstone-Dale:

CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2273,KPDmeas= 0.2315,KC= 0.2264

Optical Data:

Uniaxial (-), e=1.619, w=1.622, bire=0.0030.

Calculated Properties of Calciohilairite

Electron Density:

r_electron=2.69 gm/cc
note: r_{Calciohilairite}=2.73 gm/cc.

Fermion Index

Fermion Index = 0.03461
Boson Index = 0.96539

Photoelectric:

PE_{Calciohilairite}= 30.77 barns/electron
U=PE_{Calciohilairite} x r_electron= 82.88 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Calciohilairite is Not Radioactive

Calciohilairite Classification

Dana Class:

59.2.3.2 (59)Cyclosilicate Three-Membered Rings

(59.2)hydrated

(59.2.3)Hilairite group

59.2.3.1 Hilairite Na2ZrSi3O9·3(H2O) R 3m 3 2/m

59.2.3.2 Calciohilairite CaZrSi3O9·3(H2O) R 32 3 2

59.2.3.3 Sazykinaite-(Y) Na5YZrSi6018·6(H2O) R 32 3 2

59.2.3.4 Pyatenkoite-(Y)! Na5(Y,Dy,Gd)TiSi6O18·6(H2O) R 32 3 2

Strunz Class:

VIII/F.29-20 VIII - Silicates

VIII/F - Inosilicates (chain and band) Six chains [Si6O18]12- and six bands [Si12O30]12-

VIII/F.29 - Hilairite - Stokesite series

VIII/F.29-10 Hilairite Na2ZrSi3O9·3(H2O) R 3m 3 2/m

VIII/F.29-20 Calciohilairite CaZrSi3O9·3(H2O) R 32 3 2

VIII/F.29-24 Pyatenkoite-(Y)! Na5(Y,Dy,Gd)TiSi6O18·6(H2O) R 32 3 2

VIII/F.29-25 Sazykinaite-(Y) Na5YZrSi6018·6(H2O) R 32 3 2

VIII/F.29-30 Stokesite CaSnSi3O9·2(H2O) Pnna 2/m 2/m 2/m

Other Calciohilairite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.73,p1191-1194,1988) OPTIC PROP.(Am.Min.,Vol.73,p1191-1194,1988)

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Calciohilairite

CaZrSi3O9·3(H2O)
Dana No: 59.2.3.2 Strunz No: VIII/F.29-20
Locality:

Notes: