Holdenite Mineral Data

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Holdenite Mineral Data

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.

Name Pronunciation:

Holdenite + Pronunciation

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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Forms: ( 2 1 1) ( 1 3 1) ( 0 1 0) ( 1 1 0) ( 7 16 2) ( 1 1 1) ( 1 0 0)

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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

Diaphaneity:

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
Ncalc = 1.78 - 1.79

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:

Bulk Density (Electron Density)=3.89 gm/cc
note: Specific Gravity of Holdenite =4.11 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Holdenite= 27.65 barns/electron
U=PE_Holdenite x rElectron Density= 107.66 barns/cc.

Radioactivity:

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

Holdenite Classification

Dana Class:

43.04.07.01 (43)Compound Phosphates, etc.

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

(43.04.07)Dana Group

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

Strunz Class:

08.BE.55 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1

08.BE.55 Holdenite (Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8 Abma 2/m 2/m 2/m

Other Holdenite Information

References:

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

See Also:

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

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Ask about Holdenite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Holdenite

(Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8
Dana No: 43.04.07.01 Strunz No: 08.BE.55
Locality:

Notes: