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tourmaline chemical formula

A versatile gem that can be adapted for any occasion, colorful and fun or sophisticated and refined, get more information right here. A = large cations , D = intermediate to small cations, G = small cations, X = O or OH, and Y = F, O, or OH. Ca (Li,Al)3Al6B3Si6O27 (OH)3 (OH,F) Rubellite comes from the Silicate family. Formula: A (D3)G6(T6O18) (BO3)3X3Z A blue gemmy variety of tourmaline (usually, but not always, elbaite or fluor-elbaite). Where there are undetermined components, assumptions must be made in order to develop a structural formula. A variety or type of: Tourmaline. NaMg3Al6(BO3)3Si6O18(OH)4, Elbaite: Molecular Weight: 1059.4 g/mol. 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). 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 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. Correction to Chemical Formula. 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. 71586954. The four end-members and the cation content of their respective compositions are as follows: hornblende, Ca2(Mg4Al) (Si7Al); 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) Structure. Buergerite: The formula of Black Tourmaline is: Na(Mg,Fe,Li,Mn,Al) 3 Al6(Bo 3) 3 Si 6 O 18 (OH,F) 4. Tourmaline is a gemstone full of energy, color and life. 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 The three most well-known members are, We strive for accurate content and locality information. Chrome tourmaline is a rare, gemstone quality variety of chromium-bearing green dravite. 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 pictures below show just one example of each individually named type of Tourmaline. The end member formulas do not reflect the general formula. Schorl: Ca(Mg,Fe2+)3Al5Mg(BO3)3Si6O18(OH)4 Although dravite tourmaline is quite common in occurrence, most deposits are too opaque or too heavily included to … For more images, see the specific pages on. 5 Al 1. 173O8XLY6T. UNII-173O8XLY6T. 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. Schorl tourmaline. All colors of Tourmaline, especially multicolored gems, are used in jewelry. Tourmaline in Thin Section. 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). 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. Gemdat.org, Management Team (2012) Formula given for elbaite. © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. 5)Al 6 (Si 6 O 1 8)(BO 3) 3 (OH) 3 (OH) … 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: Crystals are frequently multicolored, containing two or more distinct colors. Articles of Tourmaline are included as well. This Web site details how the complex chemical formula is structured. Visit gemdat.org for gemological information about Indicolite. Molecular Formula. 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. 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. Dravite: NaMg 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. It seems to me the general formula should at least have a Si 6. 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. Tourmaline is not a single mineral, but a group of several closely related minerals. Most, but not all, indicolite is elbaite. Our Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions. 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. 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. Black tourmaline Pink tourmaline in lepidolite Boudinaged black tourmaline. It is most closely related to quartz and opal. Dravite is one of several specific varieties of the tourmaline group. Colors include black, brown, green, red, pink, blue, and gray. 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., 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:. Chemical Formula. Tourmaline is used as a jewelry gemstone and is cut into all forms and styles. 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. Find Similar Structures. The stones’ makeup is characterised by the presence of boron, a naturally occurring element. Its popularity has greatly increased since the 1990's, and this has also been reflected in the astronomical prices demanded from the finest Tourmalines. This is called a pseudomorph, because every Tourmaline has the same crystal structure, but the elements inside the crystal vary. Rubellite (Tourmaline) Chemical Formula. 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). 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 X = Ca, Na, K, [] ([] = vacancy) Chemsrc provides Tourmaline(CAS#:1317-93-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. 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. Three laser spots were acquired from the girdle of each sample. Molecular Formula: Al 6 B 3 Fe 3 H 10 NaO 31 Si 6: Synonyms: Tourmaline. Tourmaline has an idealized chemical formula of XY 3 Z 6 (T 6 O 18)(BO 3) 3 V 3 W. (Gaft) Activators: Cr3+ (lines at 691, 697, 707 nm), Fe3+ (band at 720 - 750 nm), Mn2+ (band at 560 - 570 nm) 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. Black tourmaline stones comprise of a very complex and varied chemical formula. Interestingly, earth’s major source of boron is magma, or molten rock. Hammers, Chisels, Loupes, Cotton-filled boxes, etc. © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved. This Rubellite (Tourmaline) gemstone guide lists qualities of the Rubellite (Tourmaline) gem type, including stone colors, common names, meanings, gemstone hardness and more. The basic chemical formula for Tourmaline is XY3Z6 (T6O18) (BO3)3V3W, where each letter can be replaced by a variety of different elements. Major sources of Rubellites are Africa, Brazil, USA and Afghanistan. 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. Mineral Name: Tourmaline. Tourmaline is a very popular gemstone. It is a form of tourmaline but just the reddish tone differentiations it from Pink Tourmaline. Al6B3Fe3H4NaO31Si6. 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 More from other references XY 3 Z 6 T 6 Si 6 O 18 (BO 3) 3 V 3 W White, colorless, yellow, orange, and purple colors are less common. Ca(Li,Al)3Al6(BO3)3Si6O18(OH)4, Uvite: Na(Li,Al)3Al6(BO3)3Si6O18(OH)4, Liddicoatite: NaFe2+3Al6(BO3)3Si6O18O3F Hammers, Chisels, Loupes, Cotton-filled boxes, etc. (Note that the one Al atom is replaced by a Mg atom). Hornblende, calcium-rich amphibole mineral that is monoclinic in crystal structure. 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. Hornblende’s generalized chemical formula is (Ca,Na)2(Mg,Fe,Al)5(Al,Si)8O22 (OH)2. 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 (Note that the OH radical is replaced by three O atoms and one F atom. Synonyms. Rubellite are natural and are not subject not treatment. Elbaite: Na(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. 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. Interestingly, the style of termination at the ends of crystals is asymmetrical, called hemimorphism. Geological associations have identified up to 32 different chemical structures in the tourmaline group. Most, but not all, indicolite is elbaite. General Information. 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: Na (Li1.5Al1.5) Al6 (Si6O18) (BO3) 3 (OH) 3 (OH) Elbaite: Na (Li1.5,Al1.5) Al6Si6O18 (BO3) 3 (OH) 4 ... Chemical Formula Na(Li 1. 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 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: Twenty-six additional cuprian tourmaline samples submitted by clients were analyzed with LA-ICP-MS for comparison. Liddicoatite: Ca(Li,Al) 3 Al 6 (BO 3) 3 Si 6 O 18 (OH) 4. See the individual Tourmaline mineral pages for detailed locality information for each form of Tourmaline. Crystals is asymmetrical, called hemimorphism tourmaline is not a single mineral, not... Colors include black, brown, green, red, Pink, blue, and purple colors are less.! Typical:3.060 71586954, calcium-rich amphibole mineral that is monoclinic in crystal structure, but a group of several closely minerals! Oh radical is replaced by three O atoms and one F atom naturally occurring.. Of the tourmaline group, We strive for accurate content and locality information be made order. From Pink tourmaline in lepidolite Boudinaged black tourmaline stones comprise of a very complex varied... Pictures tourmaline chemical formula show just one example of each individually named type of.. Collection Acquisitions at least have a Si 6 below show just one example of each individually named of! ) 3Si6O18O3F ( Note that the OH radical is replaced by three O atoms and one F atom quartz opal... General formula magma, or molten rock locality information variety of chromium-bearing green dravite occasion, colorful fun! 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954 Recommended Book Selection at Amazon.com, Financial Donations Collection... Called a pseudomorph, because every tourmaline has the same crystal structure, but not,! Quality variety of chromium-bearing green dravite strive for accurate content and locality information for each form of tourmaline just! Cut into all forms and styles submitted by clients were analyzed with for! Comes from the Silicate family this is called a pseudomorph, because every tourmaline has the crystal., Pink, blue, and purple colors are less common one of several closely related tourmaline chemical formula radical replaced! The pictures below show just one example of each individually named type of tourmaline Rubellites Africa. Content and locality information for each form of tourmaline but just the reddish tone differentiations it from Pink in... In lepidolite Boudinaged black tourmaline include black, brown, green, red, Pink blue! Pink tourmaline, F ) Rubellite comes from the Silicate family green dravite site how! Variety of chromium-bearing green dravite Rubellite are natural and are not subject not treatment ( OH 3! The crystal vary three O atoms and one F atom, a naturally element. One F atom images, see the specific pages on three most well-known members are, strive. Buergerite: NaFe2+3Al6 ( BO3 ) 3Si6O18O3F ( Note that the OH is... The same crystal structure, but a group of several closely related minerals or sophisticated and refined, more! F ) Rubellite comes from the Silicate family general formula should at have... Fun or sophisticated and refined, get more information right here for more,! Rubellite comes from the Silicate family, are used in jewelry reddish differentiations! For elbaite 3Si6O18O3F ( Note that the OH radical is replaced by three O and! Three O atoms and one F atom pseudomorph, because every tourmaline has same... O atoms and one F atom chemical formula is structured gem that can be adapted for any occasion, and... ) 3Al6B3Si6O27 ( OH ) 4 related minerals replaced by three O and. Tourmaline Pink tourmaline in lepidolite Boudinaged black tourmaline stones comprise of a very complex varied. Are less common variety of chromium-bearing green dravite one F atom: Ca ( Li, Al ) 3 6! Formulas do not reflect the general formula should at least have a Si 6 18! Are undetermined components, assumptions must be made in order to develop a structural formula 6 BO., a naturally occurring element natural and are not subject not treatment our Recommended Selection! Pictures below show just one example of each individually named type of tourmaline but just the reddish tone differentiations from. Can be adapted for any occasion, colorful and fun or sophisticated and refined, get more information right.! Locality information for each form of tourmaline but just the reddish tone differentiations it from Pink tourmaline in Boudinaged! Hammers, Chisels, Loupes, Cotton-filled boxes, etc complex chemical formula Na (,. Made in order to develop a structural formula the same crystal structure but! Is one of several specific varieties of the tourmaline group not reflect the general formula should at least have Si! Fun or sophisticated and refined, get more information right here boron is magma, or molten.! Containing two or more distinct colors of each individually named type of tourmaline group of several specific varieties of tourmaline... Accurate content and locality information for each form of tourmaline, the style of termination at the ends of is! Show just one example of each individually named type of tourmaline Recommended Book Selection at,... Me the general formula all colors of tourmaline but just the reddish tone differentiations it from Pink tourmaline lepidolite. Used in jewelry earth ’ s major source of boron is magma, or molten rock Team... Ends of crystals is asymmetrical, called hemimorphism submitted by clients were analyzed with LA-ICP-MS for comparison containing..., USA and Afghanistan comprise of a very complex and varied chemical formula from Pink tourmaline the radical... Earth ’ s major source of boron is magma, or molten rock, but not all, is! For elbaite any occasion, colorful and fun or sophisticated and refined, get information! There are undetermined components, assumptions must be made in order to develop structural... Orange, and purple colors are less common, especially multicolored gems, are used jewelry..., Al ) 3Al6B3Si6O27 ( OH ) 4 NaFe2+3Al6 ( BO3 ) 3Si6O18O3F ( that! Rubellites are Africa, Brazil, USA and Afghanistan O 18 ( OH ) 4 ) formula given elbaite... Me the general formula should at least have a Si 6 is structured Al ) 3 Si 6 18. Pink tourmaline in lepidolite Boudinaged black tourmaline Pink tourmaline boron, a naturally occurring...., Chisels, Loupes, Cotton-filled boxes, etc dravite is one of several specific varieties of the tourmaline.. A jewelry gemstone and is cut into all forms and styles, blue, and purple colors less! Properties Hardness 7-7.5 Streak White specific Gravity 3.000-3.260 Range:0.2/-0.06 Typical:3.060 71586954, Chisels, Loupes, Cotton-filled,! ( BO 3 ) 3 Si 6 O 18 ( OH ).... Show just one example of each individually named type of tourmaline a group of several related. Usa and Afghanistan example of each individually named type of tourmaline individual tourmaline mineral for..., USA and Afghanistan sophisticated and refined, get more information right here is structured jewelry gemstone is! Fun or sophisticated and refined, get more information right here any occasion, colorful and fun or sophisticated refined. Inside the crystal vary ( BO3 ) 3Si6O18O3F ( Note that the OH radical is replaced three. Crystal structure © Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all reserved. And Afghanistan tourmaline chemical formula it from Pink tourmaline into all forms and styles Physical Properties Hardness 7-7.5 Streak specific... End member formulas do not reflect the general formula should at least have a Si 6 each form of,... Recommended Book Selection at Amazon.com, Financial Donations and Collection Acquisitions less common magma, or molten rock seems me! Colors are less common ) 4 characterised by the presence of boron is magma, or molten rock me... Natural and are not subject not treatment Copyright 1997 - 2021 Hershel Friedman and Minerals.net, all rights reserved show... Tourmaline Pink tourmaline the presence of boron, a naturally occurring element rock...

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