Stringhamite (original) (raw)

A valid IMA mineral species

About StringhamiteHide

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Specific Gravity:

3.16 - 3.18

Crystal System:

Monoclinic

Name:

Named in honour of Bronson Ferrin Stringham (28 July 1907, Salt Lake City, Utah, USA - 30 May 1968, Salt Lake City, Utah, USA) professor and chair of department of mineralogy, University of Utah, USA. He made important contributions to the geology of Utah and described the mineral tinticite.

This page provides mineralogical data about Stringhamite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3802:3

a312bc17-9f98-4731-8842-8ed788aa1383

IMA Classification of StringhamiteHide

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Type description reference:

Classification of StringhamiteHide

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9.AE.35

9 : SILICATES (Germanates)
A : Nesosilicates
E : Nesosilicates with additional anions (O,OH,F,H2O); cations in tetrahedral [4] coordination

78.1.9.1

78 : Unclassified Silicates
1 : Miscellaneous

14.2.10

14 : Silicates not Containing Aluminum
2 : Silicates of Cu

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of StringhamiteHide

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Transparency:

Transparent, Translucent

Density:

3.16 - 3.18 g/cm3 (Measured) 3.67 g/cm3 (Calculated)

Optical Data of StringhamiteHide

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RI values:

_n_α = 1.709 _n_β = 1.717 _n_γ = 1.729

2V:

Measured: 80° , Calculated: 80°

δ = 0.020

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

alpha - light grey blue
beta - light blue
gamma - dark blue

Comments:

X = b, Y∧c = 2.5°

Chemistry of StringhamiteHide

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Mindat Formula:

CaCu(SiO4) · H2O

Common Impurities:

Al,Fe,Mg

Crystallography of StringhamiteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 5.030(2) Å, b = 16.135(3) Å, c = 5.343(1) Å
β = 102.96(1)°

Ratio:

a:b:c = 0.312 : 1 : 0.331

Unit Cell V:

422.59 ų (Calculated from Unit Cell)

Morphology:

Crystal habit is strongly monoclinic with (011) and (101) being the dominate
forms, with minor (010) and (111).

Twinning:

All crystals are multiple-twinned

Crystallographic forms of StringhamiteHide

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Crystal Atlas:

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3d models and HTML5 code kindly provided bywww.smorf.nl.

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Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of StringhamiteHide

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General Appearance of Type Material:

Blue crystals to 0.1 mm occuring with crystalline thaumasite on fracture surfaces in diopside-magnetite skarn. Also small radial aggregates of minute crystals occurring with bornite and chalcopyrite disseminated in granular diopside.

Place of Conservation of Type Material:

1. National Museum of Natural History, Washington, D.C., USA, 128031.
2. The Natural History Museum, London, England, 1976,421.

Geological Setting of Type Material:

In fractures near a contact between quartz monzonite and limestone. Thought to have formed by reaction of copper bearing solutions with diopside.

Associated Minerals at Type Locality:

Reference:

Hindman, J.R. (1976) Stringhamite, a new calcium copper siliate from Utah. American Mineralogist: 61: 189-192.

Synonyms of StringhamiteHide

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Other Language Names for StringhamiteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for StringhamiteHide

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References for StringhamiteHide

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Reference List:

Dunn, P.J., Chao, G.Y., Fitzpatrick, J.J., Langley, R.H., Fleischer, M., Zilczer, J.A. (1986) New mineral names. American Mineralogist: 71: 227-232.

Localities for StringhamiteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.