FLUOR-BUERGERITE Mineral Details

Complete mineralogical data for FLUOR-BUERGERITE. Chemical Formula: NaFe3+3Al6[Si6O18][BO3]3O3F. Crystal System: Hexagonal-Trigonal. Learn about its geologic occurrence, habit, and identification.

FLUOR-BUERGERITE

NaFe3+3Al6[Si6O18][BO3]3O3F

Crystal System

Hexagonal-Trigonal

Crystal Class

Ditrigonal pyramidal

Space Group

R3m

Point Group

3 m

Structure & Data

Crystal Structure

Cyclosilicates: tetrahedra are connected into rings; [Si6O18]12- 6-membered single rings with insular complex anions; GF X[9]Y3[6][(OH), F)|(OH,O)3| (BO3)3|Si6O18] with X = Na,Ca,□, rarely K with coordination XO6O3; Y = Mg,Al,Fe2+,Fe3+,Li,Mn2+,Zn,Cu with octahedral YO4(OH)2 coordination: Z = Al,Fe3+, Mg,Mn3+,Cr3+,V3+ with octahedral ZO5OH coordination; bonding power increases from X to Z: X<<Y<Z; X in unimportant for structural classification, Si6O18 rings consist of SiO4 tetrahedra with their bases aligned // (0001), & their apices directed towards -c (Barton, 1969); edge-sharing ZO5OH octahedra form stable left- & right-handed spiral chains // [0001]; chains are connected by corner-sharing of neighboring spirals, & by planes of triple grp of edge-sharing YO4(OH)2 octahedra; X atoms are loc above 6 O atoms of silicate rings & below 3 O of BO3 grp; X atoms provide very weak bonding btw superimposed unoccupied tetrahedral-octahedral complexes; X site may also be unoccupied. Post note: GF changed in 2011 AB3C6[BO3]3[Xi6O18] Y3Z.2 There are insular [Si6 O18] rings, which along c axis are combined with layers of (Mg,Fe) & Al octahedra; rings are linked by free vertices of their tetrahedra to vertices of (Mg,Fe)O6 octahedra to form triplets; these triplets of octahedra are joined via external edges to Al octahedra, 2 for each Mg octahedron, btw which in place of empty octahedra at level of upper face, lie B atoms in [3]-coordination; Al octahedra are linked vertically by their edges into helices, & this is strongest bond in structure; Na(Ca) atoms are in 6 + 3 coordination & lie btw [Si6O18] rings; Na octahedron is in contact via its 3 lower vertices with O atoms of ring, which 3 upper edges are joined to interal edges of triplets of (Mg,Fe) octahedra.3

Cell Data

a=15.87Å, c=7.19Å, Z=3

Geology & Identification

Geologic Occurrence

In granites, granite pegmatites; metamorphic rocks; high-temperature hydrothermal veins; detritalFLUOR-BUERGERITEFLUOR-BUERGERITE

Habit

Prismatic to acicular macro crystals; hemimorphic, striated; radial, fibrous, massive

Twinning

Relationships

RELATIONSHIP TO OTHER MINERALS

Tourmaline supergroup, alkali group, fluor subgroup

If you are fascinated by the hidden structures of our planet, you have likely come across FLUOR-BUERGERITE. This mineral is a compelling subject for study, offering a unique glimpse into the complex chemistry that shapes the Earth’s crust.Whether you are a student identifying a hand sample, a researcher looking for crystallographic data, or a collector curious about a new find, this guide breaks down everything you need to know about FLUOR-BUERGERITE. From its precise chemical formula to the geological environments where it thrives, let’s explore what makes this mineral distinct.

The Chemistry Behind the Crystal

Every mineral tells a story through its chemistry. At its core, FLUOR-BUERGERITE is defined by the chemical formula NaFe3+3Al6[Si6O18][BO3]3O3F.This isn’t just a string of letters and numbers; it represents the precise recipe of elements that nature used to build this specimen. This specific chemical composition is what gives the mineral its stability and dictates how it reacts with acids, heat, or other minerals. It is the fundamental “DNA” that geologists use to classify it within the larger mineral kingdom.

Crystallography: Geometry in Nature

One of the most beautiful aspects of mineralogy is the hidden geometry within every stone. FLUOR-BUERGERITE crystallizes in the Hexagonal-Trigonal system.Think of this as the mineral’s architectural blueprint. It dictates the symmetry and the angles at which the crystal faces grow. Digging deeper into its symmetry, it falls under the Ditrigonal pyramidal.
  • Point Group: 3 m
  • Space Group: R3m
Why does this matter? These crystallographic details are like a fingerprint. They influence optical properties—how light travels through the crystal—and physical traits like how it breaks or cleaves when struck.

Internal Structure and Unit Cell

If we could zoom in to the atomic level, we would see the “Unit Cell”—the smallest repeating box of atoms that builds up the entire crystal. For FLUOR-BUERGERITE, the dimensions of this microscopic building block are:
a=15.87Å, c=7.19Å, Z=3
The internal arrangement of these atoms is described as:
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Cyclosilicates: tetrahedra are connected into rings; [Si6O18]12- 6-membered single rings with insular complex anions; GF X[9]Y3[6][(OH), F)|(OH,O)3| (BO3)3|Si6O18] with X = Na,Ca,□, rarely K with coordination XO6O3; Y = Mg,Al,Fe2+,Fe3+,Li,Mn2+,Zn,Cu with octahedral YO4(OH)2 coordination: Z = Al,Fe3+, Mg,Mn3+,Cr3+,V3+ with octahedral ZO5OH coordination; bonding power increases from X to Z: X<This internal structure is the invisible framework that supports everything we see on the outside, from the mineral’s density to its hardness.
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Physical Appearance (Habit)

When you find FLUOR-BUERGERITE in the field, what does it actually look like? A mineral’s “habit” describes its typical shape and growth pattern.
  • Common Habit: Prismatic to acicular macro crystals; hemimorphic, striated; radial, fibrous, massive
  • Twinning: 
Twinning is a fascinating phenomenon where two or more crystals grow interlocked in a specific symmetrical pattern. If FLUOR-BUERGERITE exhibits twinning, it can be a dead giveaway for identification, distinguishing it from look-alike minerals.

Where is it Found? (Geologic Occurrence)

Minerals are the products of their environment. They don’t just appear anywhere; they need specific conditions—pressure, temperature, and chemical ingredients—to form.Geologic Occurrence: In granites, granite pegmatites; metamorphic rocks; high-temperature hydrothermal veins; detritalKnowing this context helps geologists reconstruct the history of a rock formation. It tells us whether the rock was born from cooling magma, settled in an ancient ocean, or was transformed by the intense heat and pressure of metamorphism. For more broad geological context, resources like the U.S. Geological Survey (USGS) provide excellent maps and data.

Related Minerals

No mineral exists in a vacuum. FLUOR-BUERGERITE is often related to other species, either through similar chemistry or structure.Relationship Data: Tourmaline supergroup, alkali group, fluor subgroupUnderstanding these relationships is key. It helps us see the “family tree” of the mineral world, showing how different elements can substitute for one another to create an entirely new species with similar properties.

Frequently Asked Questions (FAQs)

1. What is the chemical formula of FLUOR-BUERGERITE?The standard chemical formula for FLUOR-BUERGERITE is NaFe3+3Al6[Si6O18][BO3]3O3F. This defines its elemental composition.
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2. Which crystal system does FLUOR-BUERGERITE belong to?FLUOR-BUERGERITE crystallizes in the Hexagonal-Trigonal system. Its internal symmetry is further classified under the Ditrigonal pyramidal class.3. How is FLUOR-BUERGERITE typically found in nature?The “habit” or typical appearance of FLUOR-BUERGERITE is described as Prismatic to acicular macro crystals; hemimorphic, striated; radial, fibrous, massive. This refers to the shape the crystals take when they grow without obstruction.4. In what geological environments does FLUOR-BUERGERITE form?FLUOR-BUERGERITE is typically found in environments described as: In granites, granite pegmatites; metamorphic rocks; high-temperature hydrothermal veins; detrital. This gives clues to the geological history of the area where it is discovered.5. Are there other minerals related to FLUOR-BUERGERITE?Yes, it is often associated with or related to other minerals such as: Tourmaline supergroup, alkali group, fluor subgroup.

External Resources for Further Study

For those looking to dive deeper into the specific mineralogical data of FLUOR-BUERGERITE, we recommend checking high-authority databases:

Final Thoughts

FLUOR-BUERGERITE is more than just a name on a list; it is a testament to the orderly and beautiful laws of nature. With a chemical backbone of NaFe3+3Al6[Si6O18][BO3]3O3F and a structure defined by the Hexagonal-Trigonal system, it holds a specific and important place in the study of mineralogy.We hope this overview has helped clarify the essential data points for this specimen. Whether for academic study or personal interest, understanding these properties brings us one step closer to understanding the Earth itself.
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