Haradaite Mineral Data

Haradaite Mineral Data +

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General Haradaite Information

Chemical Formula:

Sr4V++++4Si8O28

Composition:

Molecular Weight = 1,221.38 gm

Barium 4.50 % Ba 5.02 % BaO

Strontium 22.96 % Sr 27.15 % SrO

Calcium 0.98 % Ca 1.38 % CaO

Aluminum 0.22 % Al 0.42 % Al₂O₃

Vanadium 16.27 % V 29.04 % V₂O₅

Silicon 18.40 % Si 39.36 % SiO₂

Oxygen 36.68 % O

______ ______

100.00 % 102.36 % = TOTAL OXIDE

Empirical Formula:

Sr_3.2Ba_0.4Ca_0.3Al_0.1V⁵⁺_3.9Si₈O₂₈

Environment:

In coarse-grained rhodonite ore (Noda-Tamagawa mine, Japan); as veinlets cutting rhodonite-goldmanite ore (Yamato mine, Japan).

IMA Status:

Approved IMA 1974

Locality:

In Japan, in the Yamato mine and on Amamioshima Island, Kagoshima Prefecture; in the Noda-Tamagawa mine, Iwate Prefecture; and in the Matsuo mine, Kochi Prefecture. Link to MinDat.org Location Data.

Name Origin:

Named for Zyunpei Harada (1898{1992), Emeritus Professor, Hokkaido University, Sapporo, Japan.

Synonym:

ICSD 30451

PDF 18-1284

Haradaite Image

Images:

Haradaite

Comments: Translucent green crystal prism fragments of haradaite.
Location: Gambatesa Mine, Val Graveglia, Liguria, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Haradaite Crystallography

Axial Ratios:

a:b:c =0.4822:1:0.364

Cell Dimensions:

a = 7.06, b = 14.64, c = 5.33, Z = 1; V = 550.90 Den(Calc)= 3.68

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Ama2

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

By Intensity(I/I_o): 3.2(1), 2.88(0.9), 3.65(0.4),

Physical Properties of Haradaite

Cleavage:

[010] Perfect, [100] Distinct, [001] Distinct

Color:

Green, Light blue, Light green.

Density:

3.8

Diaphaniety:

Transparent to Translucent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous (Glassy)

Optical Properties of Haradaite

Gladstone-Dale:

CI meas= 0.174 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.147 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1964,KPDmeas= 0.1902,KC= 0.2301

Optical Data:

Biaxial (?), a=1.713, b=1.721, g=1.734, bire=0.0210, 2V(Calc)=78, 2V(Meas)=90. Dispersion r < v very strong.

Pleochroism (x):

colorless or very pale green.

Pleochroism (y):

colorless or light yellowish green.

Pleochroism (z):

bluish green or bluish green.

Calculated Properties of Haradaite

Electron Density:

r_electron=3.48 gm/cc
note: r_Haradaite=3.68 gm/cc.

Fermion Index

Fermion Index = 0.03327
Boson Index = 0.96673

Photoelectric:

PE_Haradaite= 48.77 barns/electron
U=PE_Haradaite x r_electron= 169.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Haradaite is Not Radioactive

Haradaite Classification

Dana Class:

65.3.1.1 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.3)with chains P=4

(65.3.1)Haradaite group

65.3.1.1 Haradaite Sr4V4Si8O28 Ama2 mm2

65.3.1.2 Suzukiite BaVO(SiO3)2 Ama2 mm2

Strunz Class:

VIII/F.26-10 VIII - Silicates

VIII/F - Inosilicates (chain and band) Quadruplet chains [Si4O12]8-

VIII/F.26 - N/A

VIII/F.26-10 Haradaite Sr4V4Si8O28 Ama2 mm2

VIII/F.26-20 Suzukiite BaVO(SiO3)2 Ama2 mm2

Other Haradaite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

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Haradaite

Sr4V++++4Si8O28
Dana No: 65.3.1.1 Strunz No: VIII/F.26-10
Locality:

Notes: