Holdenite Mineral Data

Holdenite Mineral Data +

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General Holdenite Information

Chemical Formula:

(Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8

Composition:

Molecular Weight = 1,018.89 gm

Magnesium 1.43 % Mg 2.37 % MgO

Manganese 29.66 % Mn 38.29 % MnO

Zinc 19.25 % Zn 23.96 % ZnO

Silicon 2.76 % Si 5.90 % SiO₂

Arsenic 14.71 % As 22.56 % As₂O₅

Hydrogen 0.79 % H 7.07 % H₂O

Oxygen 31.41 % O

______ ______

100.00 % 100.16 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_5.5Mg_0.6Zn₃(AsO₄)₂(SiO₄)(OH)₈

Environment:

Secondary mineral in veinlets and other voids in a metamorphosed zinc deposit.

IMA Status:

Valid Species (Pre-IMA) 1927

Locality:

Franklin and Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Albert Fairchild Holden (1866-1913), mining engineer from Salt Lake City, Utah, USA.

Synonym:

ICSD 100075

PDF 29-903

Holdenite Image

Images:

Holdenite

Comments: Pink translucent holdenite vein with red willemite and black franlinite.
Location: Sterling Mine, Ogdensburg, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Holdenite Crystallography

Axial Ratios:

a:b:c =0.3811:1:0.2764

Cell Dimensions:

a = 11.99, b = 31.46, c = 8.697, Z = 8; V = 3,280.55 Den(Calc)= 4.13

Crystal System:

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

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

By Intensity(I/I_o): 2.838(1), 2.583(0.8), 3.582(0.8),

Forms:

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Crystal Structure:

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Moore P B , Araki T , American Mineralogist , 62 (1977) p.513-521, Holdenite, a novel cubic close-packed structure, Note: sample is from the zinc mines at Franklin, Sussex County, New Jersey, USA

Physical Properties of Holdenite

Cleavage:

[010] Poor

Color:

Yellowish red, Dark red, Pink, Orange.

Density:

4.11

Diaphaniety:

Translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Optical Properties of Holdenite

Gladstone-Dale:

CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1876,KPDmeas= 0.1885,KC= 0.1909

Optical Data:

Biaxial (+), a=1.769, b=1.77, g=1.785, bire=0.0160, 2V(Calc)=30, 2V(Meas)=30.33. Dispersion r > v distinct.

Calculated Properties of Holdenite

Electron Density:

r_electron=3.89 gm/cc
note: r_Holdenite=4.11 gm/cc.

Fermion Index

Fermion Index = 0.01076
Boson Index = 0.98924

Photoelectric:

PE_Holdenite= 27.65 barns/electron
U=PE_Holdenite x r_electron= 107.66 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Holdenite is Not Radioactive

Holdenite Classification

Dana Class:

43.4.7.1 (43)Compound Phosphates, etc.

(43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.4.7)Dana Group

43.4.7.1 Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m

Strunz Class:

VIII/B.10-10 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]

VIII/B.10 - Holdenite - Manganostibite series

VIII/B.10-10 Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m

VIII/B.10-20 Kolicite Mn7Zn4(AsO4)2(SiO4)2(OH)8 C mca 2/m 2/m 2/m

VIII/B.10-30 Manganostibite (Mn,Fe)7(SbO4)(AsO4,SiO4)O4 Ibmm 2/m 2/m 2/m

Other Holdenite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

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

Holdenite

(Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Dana No: 43.4.7.1 Strunz No: VIII/B.10-10
Locality:

Notes: