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|Name:||After Dr. Sterling B. Hendricks (1902-1981), American crystallographer, chemist, plant physiology & nutrition and soil chemistry scientist, and student of the mica group (established the polymorphs of micas), U.S. Department of Agriculture, Beltsville, Maryland. Elected to the National Academy of Sciences, Medal of Science winner and pioneer in X-ray and electron diffraction technology. Climbed Mount McKinley, Alaska (3rd expedition).|
Classification of Hendricksite
|Strunz 8th edition ID:||8/H.11-100|
|Nickel-Strunz 10th (pending) edition ID:||9.EC.20|
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
|Dana 8th edition ID:||71.2.2b.6|
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
|Hey's CIM Ref.:||16.12.19|
16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn
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Type Occurrence of Hendricksite
|Co-type Localities:||Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA|
Buckwheat Pit (Southwest Opening; Buckwheat Mine), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
|Year of Discovery:||1966|
Crystallography of Hendricksite
|Cell Parameters:||a = 5.37Å, b = 9.32Å, c = 10.3Å|
β = 99°
|Ratio:||a:b:c = 0.576 : 1 : 1.105|
|Unit Cell Volume:||V 509.15 Å³ (Calculated from Unit Cell)|
Optical Data of Hendricksite
|RI values:||nα = 1.598 - 1.624 nβ = 1.658 - 1.686 nγ = 1.660 - 1.697|
|2V:||Measured: 2° to 5°, Calculated: 20° to 44°|
|Maximum Birefringence:||δ = 0.062 - 0.073|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v slight|
Chemical Properties of Hendricksite
|Essential elements:||Al, H, K, O, Si, Zn|
|All elements listed in formula:||Al, H, K, Mg, Mn, O, Si, Zn|
Relationship of Hendricksite to other Species
|Member of:||Mica Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Hendricksite
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Hendricksite
Frondel, C. and Ito, J. (1966) Hendricksite, a new species of mica.
American Mineralogist: 51: 1107-1123.
Evans, B.W. and Strens, R.G.J. (1966) Zinc mica from Franklin Furnace, New Jersey. Nature: 211: 619.
Robert, J.-L. and Gaspérin, M. (1985): Crystal structure refinement of hendricksite, a Zn- and Mn-rich trioctahedral potassium mica: a contribution to the crystal chemistry of zinc-bearing minerals. Tschermaks Mineralogische und Petrographische Mitteilungen: 34: 1-14.
Canadian Mineralogist: 36: 905-912.
Internet Links for Hendricksite
Localities for Hendricksite
The 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.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Bemis Limestone Quarry, Athens, Town of Athens, Windham Co., Vermont, USAFrom Chester S. Lemanski, Jr., 19th Jun 2013 00:11:26