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|(x ≤ 0.33)|
|Colour:||Light grey with a ...||Hardness:||3|
|Name:||Named in allusion to the composition and its relationship to Cookeite. Al is replaced by B relative to cookeite.|
This page provides mineralogical data about Borocookeite.
Classification of Borocookeite
|IMA status:||Approved 2000|
|Explanation of status:||Published 2003|
|Nickel-Strunz 10th (pending) edition ID:||9.EC.55|
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
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Type Occurrence of Borocookeite
|Type Locality:||Sosedka pegmatite vein, Malkhan pegmatite field (Malchan; "Malechansk"), Krasnyi Chikoy, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia|
|General Appearance of Type Material:||Dense, massive crypto-flaky aggregate or thin crusts and snow-like coatings on crystals of quartz, tourmaline, and feldspars from miarolitic cavities.|
|Geological Setting of type material:||A late-stage pocket mineral in the Sosedka and Mokhovaya pegmatite veins.|
|Associated Minerals at type locality:|
Physical Properties of Borocookeite
|Colour:||Light grey with a pinkish or yellow hue|
|Density (calculated):||2.69 g/cm3|
|X-Ray Powder Diffraction:|
Chemical Properties of Borocookeite
(x ≤ 0.33)
|Simplified for copy/paste:||Li1+3xAl4-x(BSi3O10)(OH)8|
|Essential elements:||Al, B, H, Li, O, Si|
|All elements listed in formula:||Al, B, H, Li, O, Si|
SiO2 (34.19) TiO2 (0.02) Al2O3 (41.77) FeO (0.06) MnO (0.07) MgO (0.04) CaO (0.08) Na2O (0.01) K2O (<0.01) Li2O (4.65) Rb2O (0.004) Cs2O (0.005) B2O3 (4.06) BeO (0.05) H2O+ (14.17), H2O (0.11) F (1.22) O=F (0.51), total 100.00
Relationship of Borocookeite to other Species
|Member of:||Chlorite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Borocookeite
|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 Borocookeite
Zagorsky, V.Y., Peretyazhko, I.S., Sapozhnikov, A.N., Zhukhlistov, A.P., Zvyagin, B.B. (2003): Borocookeite, a new member of the chlorite group from the Malkhan deposit, Central Transbaikalia, Russia. American Mineralogist: 88, 830-836.
Internet Links for Borocookeite
Localities for Borocookeite
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: Bowden Mine, Jesus Maria, East Belt, Calaveras Co., California, USAFrom Chester S. Lemanski, Jr., 30th Aug 2014 16:13:27