Wawayandaite Mineral Data

General Wawayandaite Information

Chemical Formula:

Ca12Mn4B2Be18Si12O46(OH,Cl)30 [Ortho]

Composition:

Molecular Weight = 2,523.08 gm

Calcium 19.06 % Ca 26.67 % CaO

Manganese 8.71 % Mn 11.25 % MnO

Beryllium 6.43 % Be 17.84 % BeO

Silicon 13.36 % Si 28.58 % SiO₂

Boron 0.86 % B 2.76 % B₂O₃

Hydrogen 1.08 % H 9.64 % H₂O

Chlorine 4.22 % Cl 4.22 % Cl

- % Cl -0.95 % -O=Cl₂

Oxygen 46.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₁₂Mn²⁺₄B₂Be₁₈Si₁₂O₄₆(OH)₂₇Cl₃

Environment:

Found in a museum specimen of willemite.

IMA Status:

Approved IMA 1989

Locality:

Franklin mine, Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named from the Lenni Lenape Native American word "wawayanda," many or several winding, in allusion to the grossly curved and winding habit of its crystals.

Name Pronunciation:

Wawayandaite + Pronunciation

Synonym:

IMA1988-043

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Wawayandaite Crystallography

Axial Ratios:

a:b:c =3.2012:1:3.8377

Cell Dimensions:

a = 15.59, b = 4.87, c = 18.69, Z = 1; beta = 101.84° V = 1,388.82 Den(Calc)= 3.02

Crystal System:

MonoclinicSpace Group: P 2/c or Pc

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

By Intensity(I/I_o): 3.157(1), 15.1(0.9), 3.001(0.7),

Physical Properties of Wawayandaite

Cleavage:

{100} Perfect

Color:

Colorless, White.

Density:

Diaphaneity:

Transparent

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

1 - Talc

Luster:

Pearly

Streak:

white

Optical Properties of Wawayandaite

Gladstone-Dale:

CI meas= 0.096 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.102 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2087,KPDmeas= 0.2101,KC= 0.2325
Ncalc = 1.7

Optical Data:

Biaxial (-), a=1.619, b=1.631, g=1.641, bire=0.0220, 2V(Calc)=84, 2V(Meas)=85. Dispersion r < v strong.

Calculated Properties of Wawayandaite

Electron Density:

Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Wawayandaite =3.00 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Wawayandaite= 5.40 barns/electron
U=PE_Wawayandaite x rElectron Density= 16.07 barns/cc.

Radioactivity:

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

Wawayandaite Classification

Dana Class:

78.07.19.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.19)Dana Group

78.07.19.01 Wawayandaite Ca12Mn4B2Be18Si12O46(OH,Cl)30[Ortho] P 2/c or Pc Mono

Strunz Class:

09.HA.20 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HA -With alkali and alkali-earth Elements

09.HA.20 Wawayandaite Ca12Mn4B2Be18Si12O46(OH,Cl)30[Ortho] P 2/c or Pc Mono

Other Wawayandaite Information

References:

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

See Also:

Links to other databases for Wawayandaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Print or Cut-and-Paste your Wawayandaite Specimen Label here :

Wawayandaite

Ca12Mn4B2Be18Si12O46(OH,Cl)30 [Ortho]
Dana No: 78.07.19.01 Strunz No: 09.HA.20
Locality:

Notes: