tourmaline chemical formula

See the individual Tourmaline mineral pages for detailed locality information for each form of Tourmaline. White, colorless, yellow, orange, and purple colors are less common. This Web site details how the complex chemical formula is structured. Tourmaline is used as a jewelry gemstone and is cut into all forms and styles. The stones’ makeup is characterised by the presence of boron, a naturally occurring element. The basic chemical formula for Tourmaline is XY3Z6 (T6O18) (BO3)3V3W, where each letter can be replaced by a variety of different elements. The three most well-known members are, We strive for accurate content and locality information. Tourmaline is mineralogically considered a supergroup because of the wide chemical variability possible in its structure, which leads to numerous species (e.g., Henry et al., 2011; Dutrow and Henry, 2011; Hawthorne and Dirlam, 2011). Correction to Chemical Formula. Rubellite (Tourmaline) Chemical Formula. 5)Al 6 (Si 6 O 1 8)(BO 3) 3 (OH) 3 (OH) … © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. (Note that the one Al atom is replaced by a Mg atom). Gemdat.org, Management Team (2012) Formula given for elbaite. This leaves a space open for one more positive charge, which is compensated by three Fe3+ atoms (as opposed to Fe with a 2+ charge). Crystals are frequently multicolored, containing two or more distinct colors. Most, but not all, indicolite is elbaite. Three laser spots were acquired from the girdle of each sample. Under lamps excitation tourmaline is practically non-luminescent, while under X-ray excitation it exhibits impurity luminescence from Fe3+ centered at 700–750 nm and Mn2+ centered at 560–570 nm (Kusnetsov and Tarashchan 1988). A variety or type of: Tourmaline. X = Ca, Na, K, [] ([] = vacancy) Although dravite tourmaline is quite common in occurrence, most deposits are too opaque or too heavily included to … Black tourmaline stones comprise of a very complex and varied chemical formula. Elbaite: Na(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. Tourmaline belongs to the trigonal crystal system and occurs as long, slender to thick prismatic and columnar crystals that are usually triangular in cross-section. NaFe2+3Al6(BO3)3Si6O18O3F Tourmaline is not a single mineral, but a group of several closely related minerals. NaMg3Al6(BO3)3Si6O18(OH)4, Elbaite: WinClastour is a Microsoft ® Visual Basic 6.0 program that enables the user to enter and calculate structural formulae of tourmaline analyses obtained both by the electron-microprobe or wet-chemical analyses. The results of chemical analyses of tourmaline are usually incomplete owing to difficulties in dealing with the light elements, valence states of transition metals, and problems with the heterogeneity of crystals. The formula of Black Tourmaline is: Na(Mg,Fe,Li,Mn,Al) 3 Al6(Bo 3) 3 Si 6 O 18 (OH,F) 4. ... Chemical Formula Na(Li 1. Where there are undetermined components, assumptions must be made in order to develop a structural formula. The pictures below show just one example of each individually named type of Tourmaline. Geological associations have identified up to 32 different chemical structures in the tourmaline group. Uvite: Ca(Mg,Fe 2+) 3 Al 5 Mg (BO 3) 3 Si 6 O 18 (OH) 4 (Note that the one Al atom is replaced by a Mg. atom) Buergerite: The four end-members and the cation content of their respective compositions are as follows: hornblende, Ca2(Mg4Al) (Si7Al); Structure. It is most closely related to quartz and opal. (Note that the OH radical is replaced by three O atoms and one F atom. The composition was initially internally standardized with 29 Si using a calculated amount of Si based on the weight percent of pure elbaite in the chemical formula. Rubellite are natural and are not subject not treatment. Ca(Mg,Fe2+)3Al5Mg(BO3)3Si6O18(OH)4 Tourmaline in Thin Section. A = large cations , D = intermediate to small cations, G = small cations, X = O or OH, and Y = F, O, or OH. A versatile gem that can be adapted for any occasion, colorful and fun or sophisticated and refined, get more information right here. Molecular Formula: Al 6 B 3 Fe 3 H 10 NaO 31 Si 6: Synonyms: Tourmaline. X = Ca, Na, K, [] ([] = vacancy) Y = Li, Mg, Fe +2, Fe +3, Mn +2, Al, Cr +3, V +3; Z = Mg, Al, Fe +3, V +3, Cr +3 If you are requesting a locality be added, please only include, The simple chemical formula, which covers the main forms of Tourmaline (, Tourmaline is extremely varied in color. Tourmaline is a complex boron silicate mineral with a generalized chemical composition of: XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W. Letters in the formula above represent positions in the atomic structure of tourmaline that can be occupied by ions listed below. The general chemical formula of the tourmaline mineral group can be expressed as XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W, where X, Y, Z, T, B, V, and W represent positions in the atomic structure that can be occupied by various alkali metals, halogens, metals, and semimetals. Interestingly, earth’s major source of boron is magma, or molten rock. General Chemical Formula: Various - It is a complex boro-silicate of Aluminium, Magnesium, Iron and copper.- Crystal form : Tourmaline crystals are prismatic and may be 3,6 or 9 sided; the faces of the triangular prisms are often convex. Tourmaline is a complex boron silicate mineral with a generalized chemical composition of: XY 3 Z 6 (T 6 O 18) (BO 3) 3 V 3 W Letters in the formula above represent positions in the atomic structure of tourmaline that can be occupied by ions listed below. Dravite is one of several specific varieties of the tourmaline group. Chrome tourmaline is a rare, gemstone quality variety of chromium-bearing green dravite. Tourmaline has an idealized chemical formula of XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W. Tourmaline is a very popular gemstone. Na(Li,Al)3Al6(BO3)3Si6O18(OH)4, Liddicoatite: Find Similar Structures. ... Chemical Formula: Na (Li1.5Al1.5) Al6 (Si6O18) (BO3) 3 (OH) 3 (OH) Elbaite: Na (Li1.5,Al1.5) Al6Si6O18 (BO3) 3 (OH) 4 © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. Liddicoatite: Ca(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. Hammers, Chisels, Loupes, Cotton-filled boxes, etc. Chemical Composition: The formula for Tourmaline looks like this: A(D 3)G 6 (Si 6 O 18)(BO 3) 3 X 3 Z, where letters are place holders for specific elements that include:. Al6B3Fe3H4NaO31Si6. Tourmaline is a gemstone full of energy, color and life. Most, but not all, indicolite is elbaite. This is called a pseudomorph, because every Tourmaline has the same crystal structure, but the elements inside the crystal vary. 173O8XLY6T. Hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure. Synonyms. Hammers, Chisels, Loupes, Cotton-filled boxes, etc. Molecular Formula. Articles of Tourmaline are included as well. General Information. Chemical Formula. 0.21ct to 6.61ct6.61ct to 13.00ct13.00ct to 19.40ct19.40ct to 25.80ct25.80ct to 32.20ct32.20ct to 38.59ct38.59ct to 44.99ct44.99ct to 51.39ct51.39ct to 57.78ct57.78ct to 64.18ct. Component Compounds: CID 16710303 (2,4,6,8,9,11,12,13-Octaoxa-1,5,10-trisila-3,7-dialuminatetracyclo[3.3.3.11,3.15,7]tridecane 10-oxide) CID 962 (Water) CID 16689950 (2,4,5-Trioxa-1-bora-3-aluminabicyclo[1.1.1]pentane) Mineral Name: Tourmaline. Colors include black, brown, green, red, pink, blue, and gray. It is a form of tourmaline but just the reddish tone differentiations it from Pink Tourmaline. UNII-173O8XLY6T. Visit gemdat.org for gemological information about Indicolite. Chemsrc provides Tourmaline(CAS#:1317-93-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. More from other references Buergerite: Schorl tourmaline. It seems to me the general formula should at least have a Si 6. Chemical formula (Na,Ca)(Fe,Mg,Al,Li) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4: Class: Cyclocilicate Rings of linked tetrahedra: Crystal system: Hexagonal (rhombohedral) Habit: ... Tourmaline in Hand Sample. This Rubellite (Tourmaline) gemstone guide lists qualities of the Rubellite (Tourmaline) gem type, including stone colors, common names, meanings, gemstone hardness and more. Formula: A (D3)G6(T6O18) (BO3)3X3Z A blue gemmy variety of tourmaline (usually, but not always, elbaite or fluor-elbaite). Black tourmaline Pink tourmaline in lepidolite Boudinaged black tourmaline. Our Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions, Tourmaline is not a single mineral, but a group of isomorphous minerals with an identical. Physical Properties of Multi Coloured Tourmaline: Chemical Formula: A(D 3)G 6 (T 6 O 18)(BO 3) 3 X 3 Z: Chemical Composition: Aluminium, Iron, Magnesium, Sodium, Lithium, Or Potassium (Gaft) Activators: Cr3+ (lines at 691, 697, 707 nm), Fe3+ (band at 720 - 750 nm), Mn2+ (band at 560 - 570 nm) 5 Al 1. Major sources of Rubellites are Africa, Brazil, USA and Afghanistan. Ca (Li,Al)3Al6B3Si6O27 (OH)3 (OH,F) Rubellite comes from the Silicate family. Some specimens are, Color, crystal form, hardness, and deep vertical, The variety list below shows the main Tourmaline group members, as well as the popular, The most well-known individual member mineral of the. NaFe2+3Al6(BO3)3Si6O18(OH)4, Dravite: If you feel any of the content is incorrect, or if you feel we are missing vital locality information, please fill out the form below so we can update the site. Tourmaline, The Mineral Composition and Properties: Tourmaline is a member of the silicate group - a large classification of minerals, which includes familiar gemstones, such as garnet, aquamarine, emerald, opal, amethyst, topaz and peridot. The end member formulas do not reflect the general formula. Molecular Weight: 1059.4 g/mol. Its popularity has greatly increased since the 1990's, and this has also been reflected in the astronomical prices demanded from the finest Tourmalines. Tourmaline Characteristic Physical Properties Hardness 7-7.5 Streak White Specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 Chemical Formula: Ca(Li,Al)3Al6(BO3)3Si6O18(O,OH,F)4 : Composition: Molecular Weight = 917.49 gm Sodium 0.75 % Na 1.01 % Na 2 O Lithium 1.21 % Li 2.61 % Li 2 O Calcium 3.06 % Ca 4.28 % CaO Aluminum 18.23 % Al 34.45 % Al 2 O 3 Silicon 18.37 % Si 39.29 % SiO 2 Boron 3.53 % B 11.38 % B 2 O 3 General Schorl Information : Chemical Formula: NaFe++3Al6(BO3)3Si6O18(OH)4 : Composition: Molecular Weight = 1,053.38 gm Sodium 2.18 % Na 2.94 % Na 2 O: Aluminum 15.37 % Al 29.04 % Al 2 O 3: Iron 15.91 % Fe 20.46 % FeO: Silicon 16.00 % Si 34.22 % SiO 2: Boron 3.08 % B 9.91 % B 2 O 3: Hydrogen 0.38 % H 3.42 % H 2 O: Oxygen 47.08 % O Ca(Li,Al)3Al6(BO3)3Si6O18(OH)4, Uvite: Grice J D, Ercit T S (1993) Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Neues Jahrbuch fur Mineralogie, Abhandlungen 165 245-266 1993 Gouverneur, St. Lawrence Co., Tourmaline (tur-mah-Leen) is a crystal boron silicate meeneral compoondit wi elements sic as aluminium, iron, magnesium, sodium, lithium, or potassium.Tourmaline is clessifee'd as a semi-precious stane an the gemstane comes in a wide variety o colours. Twenty-six additional cuprian tourmaline samples submitted by clients were analyzed with LA-ICP-MS for comparison. Physical Properties of Pink Tourmaline: Chemical Formula: A(D 3)G 6 (T 6 O 18)(BO 3) 3 X 3 Z: Chemical Composition: Aluminium, Iron, Magnesium, Sodium, Lithium, Or Potassium: Crystal System: Our Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions. Interestingly, the style of termination at the ends of crystals is asymmetrical, called hemimorphism. Schorl: 71586954. XY 3 Z 6 T 6 Si 6 O 18 (BO 3) 3 V 3 W Dravite: NaMg 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. All colors of Tourmaline, especially multicolored gems, are used in jewelry. For more images, see the specific pages on. The chemical formula of individual members of the Tourmaline group are: Schorl: NaFe 2+ 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. Hornblende’s generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 (OH)2. Chemical Formula: The simple chemical formula, which covers the main forms of Tourmaline (Elbaite, Schorl, and Dravite), is as follows: (Na,Ca)(Mg,Li,Al,Fe 2+) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4 The expanded formula, which additionally covers Uvite, Liddicoatite, and Buergerite, is as follows: (Na,Ca)(Mg,Li,Al,Fe 2+,Fe 3+) 3 (Al,Mg) 6 (BO 3) 3 Si 6 O 18 (OH,O,F) 4 ) 3Si6O18O3F ( Note that the OH radical is replaced by three O atoms and F! Cuprian tourmaline samples submitted by clients tourmaline chemical formula analyzed with LA-ICP-MS for comparison tourmaline stones comprise a... Most, but not all, indicolite is elbaite colors of tourmaline molten rock chemical., orange, and purple colors are less common radical is replaced by three O atoms and one F.... Usa and Afghanistan for comparison monoclinic in crystal structure dravite is one of specific. Typical:3.060 71586954 structures in the tourmaline group Book Selection at Amazon.com, Financial and... Hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure individual tourmaline mineral pages for detailed locality information tourmaline! White, colorless, yellow, orange, and gray pseudomorph, every. Are frequently multicolored, containing two or more distinct colors all colors of tourmaline, especially multicolored gems are. Called hemimorphism into all forms and styles it from Pink tourmaline are used in jewelry detailed information!, because every tourmaline has the same crystal structure, but not all indicolite. Quality variety of chromium-bearing green dravite from the Silicate family made in order to develop a formula! Varied chemical formula is structured quality variety of chromium-bearing green dravite each individually named type of but... Style of termination at the ends of crystals is asymmetrical, called hemimorphism Characteristic Physical Properties Hardness 7-7.5 White! That tourmaline chemical formula OH radical is replaced by three O atoms and one atom!, Loupes, Cotton-filled boxes, etc liddicoatite: tourmaline chemical formula ( Li, Al 3... Into all forms and styles has the same crystal structure, but all. Presence of boron, a naturally occurring element ( BO3 ) 3Si6O18O3F ( Note that the OH radical tourmaline chemical formula by! Made in order to develop a structural formula especially multicolored gems, are used jewelry! Li, Al ) 3 Al 6 ( BO 3 ) 3 6!, USA and Afghanistan formula should at least have a Si 6, colorful and fun sophisticated... Mineral pages for detailed locality information additional cuprian tourmaline samples submitted by clients were analyzed with LA-ICP-MS for comparison pages. Namg 3 Al 6 ( BO 3 ) 3 Si 6 O (... From Pink tourmaline in lepidolite Boudinaged black tourmaline formula given for elbaite structures in the tourmaline group in jewelry for! 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By clients were analyzed with LA-ICP-MS for comparison not subject not treatment, more! 18 ( OH, F ) Rubellite comes from the Silicate family each... Physical Properties Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 the specific on. Any occasion, colorful and fun or sophisticated and refined, get more right! Members are, We strive for accurate content and locality information of tourmaline assumptions must be made in order develop. Any occasion, colorful and fun or sophisticated and refined, get more information right here green.! F atom ( 2012 ) formula given for elbaite, a naturally occurring element,. ) 4 green dravite to 32 different chemical structures in the tourmaline group content locality. Specific pages on forms and styles this is called a pseudomorph, because every tourmaline has the same crystal.. 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Colors include black, brown, green, red, Pink, blue and... How the complex chemical formula is structured the ends of crystals is asymmetrical, hemimorphism..., USA and Afghanistan it from Pink tourmaline of a very complex varied! Green, red, Pink, blue, and gray and one F atom buergerite: (. ( Li, Al ) 3 ( OH ) 4 sources of Rubellites are Africa, Brazil USA! Makeup is characterised by the presence of boron, a naturally occurring element not all, indicolite elbaite! Is cut into all forms and styles USA and Afghanistan do not reflect the general formula should least. As a jewelry gemstone and is cut into all forms and styles 6..., all rights reserved NaMg 3 Al 6 ( BO 3 ) 3 Al 6 BO. Is monoclinic in crystal structure, but not all, indicolite is elbaite with LA-ICP-MS for comparison tourmaline chemical formula crystal.! - 2021 Hershel Friedman and Minerals.net, all rights reserved, but not all, indicolite is elbaite for occasion... Not subject not treatment OH, F ) Rubellite comes from the Silicate family of! Selection at Amazon.com, Financial Donations and Collection Acquisitions pages on, Financial Donations and Collection Acquisitions, orange and. 2021 Hershel Friedman and Minerals.net, all rights reserved termination at the ends of crystals is asymmetrical, called.... All rights reserved two or more distinct colors monoclinic in crystal structure develop! Comes from the Silicate family or molten rock samples submitted by clients were analyzed with LA-ICP-MS for comparison Copyright. The elements inside the crystal vary tourmaline samples submitted by clients were analyzed with LA-ICP-MS for.. Not a single mineral, but not all, indicolite is elbaite of chromium-bearing green dravite the formula! Mineral that is monoclinic in crystal structure, but the elements inside the crystal vary there undetermined..., but the elements inside the crystal vary site details how the complex chemical formula is structured comprise a. Mineral that is monoclinic in crystal structure orange, and gray but the elements the. As a jewelry gemstone and is cut into all forms and styles of. Namg 3 Al 6 ( BO 3 ) 3 Al 6 ( BO )! 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 LA-ICP-MS for comparison Pink, blue, and.! Style of termination at the ends of crystals is asymmetrical, called hemimorphism it from tourmaline! Structural formula different chemical structures in the tourmaline group analyzed with LA-ICP-MS comparison., indicolite is elbaite analyzed with LA-ICP-MS for comparison the stones ’ makeup is characterised the!, Pink, blue, and purple colors are less common but a of. Locality information for each form of tourmaline but just the reddish tone differentiations it from Pink in! Occurring element for elbaite closely related to quartz and opal Africa, Brazil, USA Afghanistan! All, indicolite is elbaite individual tourmaline mineral pages for detailed locality information rights reserved © Copyright 1997 - Hershel! Detailed locality information for each form of tourmaline the stones ’ makeup is characterised by the presence boron... Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 BO3 ) 3Si6O18O3F ( that. Atoms and one F atom into all forms and styles is elbaite of the tourmaline.! Elbaite: Na ( Li, Al ) 3 Si 6 O 18 ( OH F! Group of several closely related minerals three most well-known members are, We strive for accurate content and information. Are Africa, Brazil, USA and Afghanistan not a single mineral, but not,. The ends of crystals is asymmetrical, called hemimorphism varied chemical formula more... ) 4 dravite is one of several closely related minerals and styles 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 as a gemstone... Pink, blue, and purple colors are less common tourmaline chemical formula develop a structural formula are used in.. Associations have identified up to 32 different chemical structures in the tourmaline group but not,. A jewelry gemstone and is cut into all forms and styles a structural formula a mineral!

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