If you are fascinated by the hidden structures of our planet, you have likely come across
JUABITE. 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
JUABITE. 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,
JUABITE is defined by the chemical formula
CaCu10(Te4+O3)4(AsO4)4(OH)2(H2O)4.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.
JUABITE crystallizes in the
Triclinic 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
Pinacoidal.
- Point Group: 1
- Space Group: P1
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
JUABITE, the dimensions of this microscopic building block are:
a=8.98Å, b=10.07Å, c=8.97Å, α=102.7o, ß=92.4o, γ=70.4o, Z=1
The internal arrangement of these atoms is described as:
Phosphates, arsenates, vanadates: anions [PO4]3-, [AsO4]3-,[VO4]3- are usually insular; cations [4], [6], [8] with octahedral [6]cations may be insular, corner-, edge- or face-sharing & form major structural units w/o more anions with H2O with medium-sized cations, RO4:H2O = 1:1; structures not known.1 Contains 5 Cu2+ positions that are each in □∆ coordination; 2 symmetrically distinct Te4+ cations are in usual 1-sided coordination owing to presence of lone pair electrons on cation; there are 3 short Te4+—O bonds in each polyhedron, 2 or 3 longer bonds; structure contains 2 unique As5+ cation that are tetrahedrally coordinated by O2- anions, & Ca position that is octahedrally coordinated by O2- anions; juabite possesses layered heteropolyhedral framework structure; layers || to (010) are weakly bonded in [010] direction, resulting {010} cleavage; each layer contains all of cation polyhedra of structure, & involves 2 symmetrically identical sheets that contain 4 CuΦ5 □∆ [Φ:O2-, (OH)-, H2O], both Te4+Φn polyhedra & both AsO4 tetrahedra; sheets are || to (010) & chains of edge-sharing CaO6 octahedra & CuΦ5 □∆’s extending || to [001] are sandwiched btw adjacent symmetrically identical sheets, all anions contained within chains are linked to sheets on either side, resulting in heteropolyhedral layers.2 Nesotellurium Oxysalt: has structure in which double layers || (010) are held together only thru long Te∙∙O bonds; 2 sublayers contain edge-sharing blocks OTe = Cu = O2 = Cu = O2 = TeO with long axes || [101], which are held together by sharing corners with continuous chains of more CuO4 □ AsO4 tetrahedra; resulting net is centered-rectangular ±, & has 8- & 3-rings; 2 such sheets are linked by inward-pointing apical O of AsO4 tetrahedra connecting to add’l Cu2O4 (OH)2 dimers; loosely bound H2O & [6]Ca2+ lie btw 2 sublayers.3 See “Additional Structures” tab for entry(s).4This internal structure is the invisible framework that supports everything we see on the outside, from the mineral’s density to its hardness.
Physical Appearance (Habit)
When you find
JUABITE in the field, what does it actually look like? A mineral’s “habit” describes its typical shape and growth pattern.
- Common Habit: Sraight to wavy fibers, aggregated into rounded grains; concentrically layered, surrounding simpsonite
- Twinning:
Twinning is a fascinating phenomenon where two or more crystals grow interlocked in a specific symmetrical pattern. If JUABITE 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:
Simpsonite replacement, result of Na-metasomatism in some Li-Ta-Nb-bearing granite pegmatitesKnowing 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.
JUABITE is often related to other species, either through similar chemistry or structure.
Relationship Data:Understanding 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 JUABITE?The standard chemical formula for JUABITE is
CaCu10(Te4+O3)4(AsO4)4(OH)2(H2O)4. This defines its elemental composition.
2. Which crystal system does JUABITE belong to?JUABITE crystallizes in the
Triclinic system. Its internal symmetry is further classified under the Pinacoidal class.
3. How is JUABITE typically found in nature?The “habit” or typical appearance of JUABITE is described as
Sraight to wavy fibers, aggregated into rounded grains; concentrically layered, surrounding simpsonite. This refers to the shape the crystals take when they grow without obstruction.
4. In what geological environments does JUABITE form?JUABITE is typically found in environments described as:
Simpsonite replacement, result of Na-metasomatism in some Li-Ta-Nb-bearing granite pegmatites. This gives clues to the geological history of the area where it is discovered.
5. Are there other minerals related to JUABITE?Yes, it is often associated with or related to other minerals such as:
.
External Resources for Further Study
For those looking to dive deeper into the specific mineralogical data of
JUABITE, we recommend checking high-authority databases:
Final Thoughts
JUABITE 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
CaCu10(Te4+O3)4(AsO4)4(OH)2(H2O)4 and a structure defined by the
Triclinic 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.
